diff --git a/01-basic/04-hello-world/04-first-application.js b/01-basic/04-hello-world/04-first-application.js
new file mode 100644
index 0000000..2fc77b4
--- /dev/null
+++ b/01-basic/04-hello-world/04-first-application.js
@@ -0,0 +1,3 @@
+'use strict';
+
+console.log(`Hello, world from Node ${process.version}`);
diff --git a/01-basic/04-hello-world/readme.md b/01-basic/04-hello-world/readme.md
new file mode 100644
index 0000000..6969842
--- /dev/null
+++ b/01-basic/04-hello-world/readme.md
@@ -0,0 +1 @@
+# Глава 1.4 Привет, Мир
\ No newline at end of file
diff --git a/01-basic/07-modules/01-first-module/example.js b/01-basic/07-modules/01-first-module/example.js
new file mode 100644
index 0000000..9e00274
--- /dev/null
+++ b/01-basic/07-modules/01-first-module/example.js
@@ -0,0 +1,13 @@
+'use strict';
+
+const utils = require(`./utils`);
+
+const alphabet = [`А`, `B`, `C`, `D`, `E`, `F`, `G`];
+
+// Тасование массива
+console.log(`Тасование массива:`);
+console.log(utils.shuffle(alphabet));
+
+// Получение случайного числа
+console.log(`Получение случайного число от 1 до 10`);
+console.log(utils.getRandomInt(1, 10));
diff --git a/01-basic/07-modules/01-first-module/utils.js b/01-basic/07-modules/01-first-module/utils.js
new file mode 100644
index 0000000..77f814d
--- /dev/null
+++ b/01-basic/07-modules/01-first-module/utils.js
@@ -0,0 +1,39 @@
+'use strict';
+
+/**
+ * Перетасовка массива по алгоритму
+ * Фишера—Йетса.
+ *
+ * Функция возвращает новый массив
+ *
+ * @param {Array} array
+ * @return {Array}
+ */
+const shuffle = (array) => {
+  const resultArray = array.slice();
+  for (let i = resultArray.length - 1; i > 0; i--) {
+    const randomNumber = Math.floor(Math.random() * (i + 1));
+    [resultArray[randomNumber], resultArray[i]] = [resultArray[i], resultArray[randomNumber]];
+  }
+
+  return resultArray;
+};
+
+/**
+ * Возвращает случайное число в диапазоне
+ * `min` и `max`.
+ *
+ * @param {Number} min
+ * @param {Number} max
+ * @return {Number}
+ */
+const getRandomInt = (min, max) => {
+  min = Math.ceil(min);
+  max = Math.floor(max);
+  return Math.floor(Math.random() * (max - min + 1)) + min;
+};
+
+module.exports = {
+  getRandomInt,
+  shuffle,
+};
diff --git a/01-basic/07-modules/02-module-exports/example.js b/01-basic/07-modules/02-module-exports/example.js
new file mode 100644
index 0000000..5f6bd50
--- /dev/null
+++ b/01-basic/07-modules/02-module-exports/example.js
@@ -0,0 +1,5 @@
+'use strict';
+
+const simpleModule = require(`./simple-module`);
+
+console.log(simpleModule);
diff --git a/01-basic/07-modules/02-module-exports/simple-module.js b/01-basic/07-modules/02-module-exports/simple-module.js
new file mode 100644
index 0000000..12afc63
--- /dev/null
+++ b/01-basic/07-modules/02-module-exports/simple-module.js
@@ -0,0 +1,7 @@
+'use strict';
+
+// Экспортируем myProperty со значением 1
+module.exports.myProperty = 1;
+
+// Экспортируем фунцию foo
+module.exports.foo = () => console.log(`Hello from function`);
diff --git a/01-basic/07-modules/03-exports/exports.js b/01-basic/07-modules/03-exports/exports.js
new file mode 100644
index 0000000..74beaea
--- /dev/null
+++ b/01-basic/07-modules/03-exports/exports.js
@@ -0,0 +1,4 @@
+'use strict';
+
+exports.foo = () => console.log(`This is first function`);
+exports.anotherFoo = () => console.log(`This if second function`);
diff --git a/01-basic/07-modules/03-exports/import.js b/01-basic/07-modules/03-exports/import.js
new file mode 100644
index 0000000..2898584
--- /dev/null
+++ b/01-basic/07-modules/03-exports/import.js
@@ -0,0 +1,4 @@
+'use strict';
+
+const simpleModule = require(`./exports`);
+console.log(simpleModule);
diff --git a/01-basic/07-modules/04-not-exports/example.js b/01-basic/07-modules/04-not-exports/example.js
new file mode 100644
index 0000000..5f6bd50
--- /dev/null
+++ b/01-basic/07-modules/04-not-exports/example.js
@@ -0,0 +1,5 @@
+'use strict';
+
+const simpleModule = require(`./simple-module`);
+
+console.log(simpleModule);
diff --git a/01-basic/07-modules/04-not-exports/simple-module.js b/01-basic/07-modules/04-not-exports/simple-module.js
new file mode 100644
index 0000000..7184525
--- /dev/null
+++ b/01-basic/07-modules/04-not-exports/simple-module.js
@@ -0,0 +1,10 @@
+'use strict';
+
+const foo = (text) => console.log(text);
+const anotherFoo = () => console.log(`This is another func`);
+
+module.exports = {
+  foo,
+};
+
+exports.anotherFoo = anotherFoo;
diff --git a/01-basic/07-modules/05-own-require/05-example.js b/01-basic/07-modules/05-own-require/05-example.js
new file mode 100644
index 0000000..13db4c9
--- /dev/null
+++ b/01-basic/07-modules/05-own-require/05-example.js
@@ -0,0 +1,7 @@
+'use strict';
+
+console.log(`Hello from test module!`);
+
+module.exports = {
+  test: () => console.log(`Hello, world!`),
+};
diff --git a/01-basic/07-modules/05-own-require/05-own-require.js b/01-basic/07-modules/05-own-require/05-own-require.js
new file mode 100644
index 0000000..e235cad
--- /dev/null
+++ b/01-basic/07-modules/05-own-require/05-own-require.js
@@ -0,0 +1,28 @@
+'use strict';
+
+const fs = require(`fs`);
+
+const customRequire = (modulePath) => {
+  const resolvePath = require.resolve(modulePath);
+
+  if (customRequire.cache[resolvePath]) {
+    return customRequire.cache[resolvePath].exports;
+  }
+
+  const moduleCode = fs.readFileSync(resolvePath, `utf-8`);
+
+  const module = {id: resolvePath, exports: {}};
+  customRequire.cache[resolvePath] = module;
+
+  const wrapperFunction = Function(`require, exports, module`, moduleCode);
+  wrapperFunction(customRequire, module.exports, module);
+
+
+  return customRequire.cache[resolvePath].exports;
+};
+
+customRequire.cache = {};
+
+
+const exampleModule = customRequire(`./05-example.js`);
+exampleModule.test();
diff --git a/01-basic/07-modules/06-module-sync/main.js b/01-basic/07-modules/06-module-sync/main.js
new file mode 100644
index 0000000..edc52f4
--- /dev/null
+++ b/01-basic/07-modules/06-module-sync/main.js
@@ -0,0 +1,5 @@
+'use strict';
+
+require(`./module-a`);
+require(`./module-b`);
+require(`./module-c`);
diff --git a/01-basic/07-modules/06-module-sync/module-a.js b/01-basic/07-modules/06-module-sync/module-a.js
new file mode 100644
index 0000000..b149eaf
--- /dev/null
+++ b/01-basic/07-modules/06-module-sync/module-a.js
@@ -0,0 +1,3 @@
+'use strict';
+
+console.log(`Hello from Module A`);
diff --git a/01-basic/07-modules/06-module-sync/module-b.js b/01-basic/07-modules/06-module-sync/module-b.js
new file mode 100644
index 0000000..4162993
--- /dev/null
+++ b/01-basic/07-modules/06-module-sync/module-b.js
@@ -0,0 +1,5 @@
+'use strict';
+
+require(`./module-a`);
+
+console.log(`Hello from Module B`);
diff --git a/01-basic/07-modules/06-module-sync/module-c.js b/01-basic/07-modules/06-module-sync/module-c.js
new file mode 100644
index 0000000..e73d7ad
--- /dev/null
+++ b/01-basic/07-modules/06-module-sync/module-c.js
@@ -0,0 +1,5 @@
+'use strict';
+
+require(`./module-a`);
+
+console.log(`Hello from Module C`);
diff --git a/01-basic/07-modules/07-esm/07-example.mjs b/01-basic/07-modules/07-esm/07-example.mjs
new file mode 100644
index 0000000..d9c23a6
--- /dev/null
+++ b/01-basic/07-modules/07-esm/07-example.mjs
@@ -0,0 +1,4 @@
+import { sum, hello } from './07-simple-module.mjs';
+
+console.log(sum(1, 2));
+hello(`User`);
diff --git a/01-basic/07-modules/07-esm/07-simple-module.mjs b/01-basic/07-modules/07-esm/07-simple-module.mjs
new file mode 100644
index 0000000..cac4d3b
--- /dev/null
+++ b/01-basic/07-modules/07-esm/07-simple-module.mjs
@@ -0,0 +1,2 @@
+export const sum = (a, b) => a + b;
+export const hello = (name) => console.log(name);
diff --git a/01-basic/07-modules/readme.md b/01-basic/07-modules/readme.md
new file mode 100644
index 0000000..c78fa1c
--- /dev/null
+++ b/01-basic/07-modules/readme.md
@@ -0,0 +1 @@
+# Глава 1.7 Модули
\ No newline at end of file
diff --git a/01-basic/08-cli/07-first-console-app.js b/01-basic/08-cli/07-first-console-app.js
new file mode 100644
index 0000000..68f1e02
--- /dev/null
+++ b/01-basic/08-cli/07-first-console-app.js
@@ -0,0 +1,5 @@
+'use strict';
+
+const [nodePath, appPath] = process.argv;
+console.log(`Путь к Node: ${nodePath}`);
+console.log(`Путь к текущему сценарию: ${appPath}`);
diff --git a/01-basic/08-cli/07-guess-the-number-with-chalk/07-guess-the-number-with-chalk.js b/01-basic/08-cli/07-guess-the-number-with-chalk/07-guess-the-number-with-chalk.js
new file mode 100644
index 0000000..fee1acd
--- /dev/null
+++ b/01-basic/08-cli/07-guess-the-number-with-chalk/07-guess-the-number-with-chalk.js
@@ -0,0 +1,63 @@
+'use strict';
+
+const readline = require(`readline`);
+const chalk = require(`chalk`);
+
+const welcomeText = `
+          Добро пожаловать в игру
+              «Угадай число»
+
+                |\\---/|
+                | o_o |
+                 \\_^_/
+
+Привет, я Кекс. Мне нравится загадывать числа.
+Всё честно: вы назовёте максимальное число, а я
+загадаю случайное число в диапазоне от нуля до предложенного вами числа.
+
+Попробуйте его угадать. Количество попыток неограничено.`;
+
+const readLineInterface = readline.createInterface({
+  input: process.stdin,
+  output: process.stdout,
+});
+
+const getRandomNumber = (min, max) => {
+  min = Math.ceil(min);
+  max = Math.floor(max);
+  return Math.floor(Math.random() * (max - min)) + min;
+};
+
+const showWinMessage = (secretNumber) => {
+  console.log(chalk.magenta(`
+  |\\---/|
+  | o_o | Ура! Вы угадали число.
+   \\_^_/  Я действительно загадал ${secretNumber}.
+  `));
+
+  readLineInterface.close();
+};
+
+const checkAnswer = (secretNumber) => {
+  readLineInterface.question(chalk.blueBright(`Ваш ответ: `), (inputNumber) => {
+    const userAnswer = Number.parseInt(inputNumber, 10);
+
+    if (secretNumber === userAnswer) {
+      return showWinMessage(secretNumber);
+    }
+
+    console.log(chalk.redBright(`Промазал. Попробуй ещё.`));
+    return checkAnswer(secretNumber);
+  });
+};
+
+const startGame = () => {
+  console.log(chalk.green(welcomeText));
+
+  readLineInterface.question(chalk.bgYellow.red(`Максимальное число: `), (maxNumber) => {
+    const myNumber = getRandomNumber(0, Number.parseInt(maxNumber, 10));
+    checkAnswer(myNumber);
+  });
+};
+
+startGame();
diff --git a/01-basic/08-cli/07-guess-the-number-with-chalk/package-lock.json b/01-basic/08-cli/07-guess-the-number-with-chalk/package-lock.json
new file mode 100644
index 0000000..e46db9f
--- /dev/null
+++ b/01-basic/08-cli/07-guess-the-number-with-chalk/package-lock.json
@@ -0,0 +1,57 @@
+{
+  "name": "guess-the-number-with-chalk",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@types/color-name": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/@types/color-name/-/color-name-1.1.1.tgz",
+      "integrity": "sha512-rr+OQyAjxze7GgWrSaJwydHStIhHq2lvY3BOC2Mj7KnzI7XK0Uw1TOOdI9lDoajEbSWLiYgoo4f1R51erQfhPQ=="
+    },
+    "ansi-styles": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.2.0.tgz",
+      "integrity": "sha512-7kFQgnEaMdRtwf6uSfUnVr9gSGC7faurn+J/Mv90/W+iTtN0405/nLdopfMWwchyxhbGYl6TC4Sccn9TUkGAgg==",
+      "requires": {
+        "@types/color-name": "^1.1.1",
+        "color-convert": "^2.0.1"
+      }
+    },
+    "chalk": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-3.0.0.tgz",
+      "integrity": "sha512-4D3B6Wf41KOYRFdszmDqMCGq5VV/uMAB273JILmO+3jAlh8X4qDtdtgCR3fxtbLEMzSx22QdhnDcJvu2u1fVwg==",
+      "requires": {
+        "ansi-styles": "^4.1.0",
+        "supports-color": "^7.1.0"
+      }
+    },
+    "color-convert": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
+      "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
+      "requires": {
+        "color-name": "~1.1.4"
+      }
+    },
+    "color-name": {
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
+      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA=="
+    },
+    "has-flag": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
+      "integrity": "sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ=="
+    },
+    "supports-color": {
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.1.0.tgz",
+      "integrity": "sha512-oRSIpR8pxT1Wr2FquTNnGet79b3BWljqOuoW/h4oBhxJ/HUbX5nX6JSruTkvXDCFMwDPvsaTTbvMLKZWSy0R5g==",
+      "requires": {
+        "has-flag": "^4.0.0"
+      }
+    }
+  }
+}
diff --git a/01-basic/08-cli/07-guess-the-number-with-chalk/package.json b/01-basic/08-cli/07-guess-the-number-with-chalk/package.json
new file mode 100644
index 0000000..2ebe58e
--- /dev/null
+++ b/01-basic/08-cli/07-guess-the-number-with-chalk/package.json
@@ -0,0 +1,15 @@
+{
+  "name": "guess-the-number-with-chalk",
+  "version": "1.0.0",
+  "description": "A simple console game",
+  "main": "07-guess-the-number-with-chalk.js",
+  "scripts": {
+    "start": "node ./07-guess-the-number-with-chalk.js",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "HTML Academy",
+  "license": "MIT",
+  "dependencies": {
+    "chalk": "^3.0.0"
+  }
+}
diff --git a/01-basic/08-cli/07-guess-the-number.js b/01-basic/08-cli/07-guess-the-number.js
new file mode 100644
index 0000000..8778f04
--- /dev/null
+++ b/01-basic/08-cli/07-guess-the-number.js
@@ -0,0 +1,62 @@
+'use strict';
+
+const readline = require(`readline`);
+
+const welcomeText = `
+          Добро пожаловать в игру
+              «Угадай число»
+
+                |\\---/|
+                | o_o |
+                 \\_^_/
+
+Привет, я Кекс. Мне нравится загадывать числа.
+Всё честно: вы назовёте максимальное число, а я
+загадаю случайное число в диапазоне от нуля до предложенного вами числа.
+
+Попробуйте его угадать. Количество попыток неограничено.`;
+
+const readLineInterface = readline.createInterface({
+  input: process.stdin,
+  output: process.stdout,
+});
+
+const getRandomNumber = (min, max) => {
+  min = Math.ceil(min);
+  max = Math.floor(max);
+  return Math.floor(Math.random() * (max - min)) + min;
+};
+
+const showWinMessage = (secretNumber) => {
+  console.log(`
+  |\\---/|
+  | o_o | Ура! Вы угадали число.
+   \\_^_/  Я действительно загадал ${secretNumber}.
+  `);
+
+  readLineInterface.close();
+};
+
+const checkAnswer = (secretNumber) => {
+  readLineInterface.question(`Ваш ответ: `, (inputNumber) => {
+    const userAnswer = Number.parseInt(inputNumber, 10);
+
+    if (secretNumber === userAnswer) {
+      return showWinMessage(secretNumber);
+    }
+
+    console.log(`Промазал. Попробуй ещё.`);
+    return checkAnswer(secretNumber);
+  });
+};
+
+const startGame = () => {
+  console.log(welcomeText);
+
+  readLineInterface.question(`Максимальное число: `, (maxNumber) => {
+    const myNumber = getRandomNumber(0, Number.parseInt(maxNumber, 10));
+    checkAnswer(myNumber);
+  });
+};
+
+startGame();
diff --git a/01-basic/08-cli/07-hello-user.js b/01-basic/08-cli/07-hello-user.js
new file mode 100644
index 0000000..b25b920
--- /dev/null
+++ b/01-basic/08-cli/07-hello-user.js
@@ -0,0 +1,7 @@
+'use strict';
+
+const [nodePath, appPath, commandName, userName] = process.argv;
+console.log(`------------------`);
+console.log(`Hello, ${userName}`);
+console.log(`Путь к Node: ${nodePath}`);
+console.log(`Путь к текущему сценарию: ${appPath}`);
diff --git a/01-basic/08-cli/07-immediately-exit-and-async.js b/01-basic/08-cli/07-immediately-exit-and-async.js
new file mode 100644
index 0000000..52ad382
--- /dev/null
+++ b/01-basic/08-cli/07-immediately-exit-and-async.js
@@ -0,0 +1,11 @@
+'use strict';
+
+const TIMEOUT = 0;
+
+console.log(`Этот текст будет выведен...`);
+setTimeout(
+    () => console.log(`А этот никогда`),
+    TIMEOUT
+);
+
+process.exit();
diff --git a/01-basic/08-cli/07-immediately-exit.js b/01-basic/08-cli/07-immediately-exit.js
new file mode 100644
index 0000000..f536326
--- /dev/null
+++ b/01-basic/08-cli/07-immediately-exit.js
@@ -0,0 +1,15 @@
+'use strict';
+
+const MAX_COUNT = 10;
+
+console.log(`Эта программа завершится, когда счётчик достигнет 10`);
+let counter = 0;
+
+while (true) {
+  counter++;
+  console.log(counter);
+
+  if (counter === MAX_COUNT) {
+    process.exit();
+  }
+}
diff --git a/01-basic/08-cli/07-param-for-app.js b/01-basic/08-cli/07-param-for-app.js
new file mode 100644
index 0000000..47caf74
--- /dev/null
+++ b/01-basic/08-cli/07-param-for-app.js
@@ -0,0 +1,3 @@
+'use strict';
+
+process.argv.forEach((param) => console.log(param));
diff --git a/01-basic/08-cli/readme.md b/01-basic/08-cli/readme.md
new file mode 100644
index 0000000..894ba9a
--- /dev/null
+++ b/01-basic/08-cli/readme.md
@@ -0,0 +1 @@
+# Глава 1.8 Command Line Interface (CLI)
\ No newline at end of file
diff --git a/01-basic/09-debug/08-simple-program.js b/01-basic/09-debug/08-simple-program.js
new file mode 100644
index 0000000..3ed277c
--- /dev/null
+++ b/01-basic/09-debug/08-simple-program.js
@@ -0,0 +1,9 @@
+'use strict';
+
+const sum = (a, b) => {
+  const result = a + b;
+  return result;
+};
+
+const good = sum(2, 5); // 7
+const bad = sum(2, `a`); // ?
diff --git a/01-basic/09-debug/readme.md b/01-basic/09-debug/readme.md
new file mode 100644
index 0000000..49ffc88
--- /dev/null
+++ b/01-basic/09-debug/readme.md
@@ -0,0 +1 @@
+# Глава 1.9 Отладка
\ No newline at end of file
diff --git a/02-async/02-callback/01-intro-callbacks.js b/02-async/02-callback/01-intro-callbacks.js
new file mode 100644
index 0000000..4b6ed7c
--- /dev/null
+++ b/02-async/02-callback/01-intro-callbacks.js
@@ -0,0 +1,11 @@
+'use strict';
+
+const foo = () => {
+  return `Hello, world!`;
+};
+
+// Вызываем функцию и выводим результат в консоль
+console.log(foo()); // Hello, world
+
+// Выводим функцию в консоль без вызова
+console.log(foo); // ƒ () { return 'Hello, world!'; }
diff --git a/02-async/02-callback/02-make-pizza.js b/02-async/02-callback/02-make-pizza.js
new file mode 100644
index 0000000..3452570
--- /dev/null
+++ b/02-async/02-callback/02-make-pizza.js
@@ -0,0 +1,17 @@
+'use strict';
+
+const makePizza = (title, cb) => {
+  console.log(`Заказ на приготовление пиццы «${title}» получен. Начинаем готовить…`);
+  setTimeout(cb, 3000);
+};
+
+const readBook = () => {
+  console.log(`Читаю книгу «Колдун и кристалл»…`);
+};
+
+const eatPizza = () => {
+  console.log(`Ура! Пицца готова, пора подкрепиться.`);
+};
+
+makePizza(`Пеперонни`, eatPizza);
+readBook();
diff --git a/02-async/02-callback/03-callback-for-pizza.js b/02-async/02-callback/03-callback-for-pizza.js
new file mode 100644
index 0000000..e6957f3
--- /dev/null
+++ b/02-async/02-callback/03-callback-for-pizza.js
@@ -0,0 +1,19 @@
+'use strict';
+
+const makePizza = (title, cb) => {
+  console.log(`Заказ на приготовление пиццы «${title}» получен. Начинаем готовить…`);
+  setTimeout(cb, 3000);
+};
+
+const readBook = () => {
+  console.log(`Читаю книгу «Колдун и кристалл»…`);
+};
+
+const eatPizza = (drink) => {
+  return () => {
+    console.log(`Ура! Пицца готова, пора подкрепиться и запить ${drink}.`);
+  };
+};
+
+makePizza(`Пепперони`, eatPizza(`Coca-Cola`));
+readBook();
diff --git a/02-async/02-callback/04-bind.js b/02-async/02-callback/04-bind.js
new file mode 100644
index 0000000..9746327
--- /dev/null
+++ b/02-async/02-callback/04-bind.js
@@ -0,0 +1,17 @@
+'use strict';
+
+const makePizza = (title, cb) => {
+  console.log(`Заказ на приготовление пиццы «${title}» получен. Начинаем готовить…`);
+  setTimeout(cb, 3000);
+};
+
+const readBook = () => {
+  console.log(`Читаю книгу «Колдун и кристалл»…`);
+};
+
+const eatPizza = (drink) => {
+  console.log(`Ура! Пицца готова, пора подкрепиться и запить ${drink}.`);
+};
+
+makePizza(`Пепперони`, eatPizza.bind(null, `Coca-Cola`));
+readBook();
diff --git a/02-async/02-callback/05-http-request.js b/02-async/02-callback/05-http-request.js
new file mode 100644
index 0000000..83cdaf8
--- /dev/null
+++ b/02-async/02-callback/05-http-request.js
@@ -0,0 +1,23 @@
+'use strict';
+
+const https = require(`https`);
+
+const loadData = (downloadUrl, cb) => {
+  https.get(downloadUrl, (res) => {
+    let loadedData = ``;
+
+    res.on(`data`, (chunk) => {
+      loadedData += chunk;
+    });
+
+    res.on(`end`, () => {
+      cb(JSON.parse(loadedData).slice(0, 5));
+    });
+  });
+};
+
+const url = `https://jsonplaceholder.typicode.com/posts`;
+
+loadData(url, (posts) => {
+  console.log(posts);
+});
diff --git a/02-async/02-callback/readme.md b/02-async/02-callback/readme.md
new file mode 100644
index 0000000..d12c2e1
--- /dev/null
+++ b/02-async/02-callback/readme.md
@@ -0,0 +1 @@
+# Глава 2.2 Коллбэк-функции
\ No newline at end of file
diff --git a/02-async/03-promises/01-soup-and-callback-hell.js b/02-async/03-promises/01-soup-and-callback-hell.js
new file mode 100644
index 0000000..87e1def
--- /dev/null
+++ b/02-async/03-promises/01-soup-and-callback-hell.js
@@ -0,0 +1,25 @@
+/* eslint-disable max-nested-callbacks */
+'use strict';
+
+const TIMEOUT = 1000;
+
+const makeSoup = () => {
+  console.log(`> Иду за продуктами`);
+  const products = [`Капуста`, `Картофель`, `Мясо`];
+  setTimeout(() => {
+    console.log(`> Нарезаю продукты: ${products.join(`, `)}`);
+    setTimeout(() => {
+      console.log(`> Продукты нарезаны!`);
+      setTimeout(() => {
+        console.log(`> Начинаю варить суп из: ${products.join(`, `)}`);
+        setTimeout(() => {
+          return Math.random() > 0.5
+            ? console.log(`> Суп готов!`)
+            : console.log(`> Упс! Сломалась плита.`);
+        });
+      }, TIMEOUT);
+    }, TIMEOUT);
+  }, TIMEOUT);
+};
+
+makeSoup();
diff --git a/02-async/03-promises/02-promises-rescue-rangers.js b/02-async/03-promises/02-promises-rescue-rangers.js
new file mode 100644
index 0000000..873601d
--- /dev/null
+++ b/02-async/03-promises/02-promises-rescue-rangers.js
@@ -0,0 +1,41 @@
+'use strict';
+
+const TIMEOUT = 1000;
+
+const buyProducts = () => {
+  console.log(`> Иду за продуктами...`);
+  return new Promise((resolve) => {
+    setTimeout(() => {
+      const products = [`Картофель`, `Капуста`, `Мясо`];
+      resolve(products);
+    }, TIMEOUT);
+  });
+};
+
+const prepareProducts = (products) => {
+  console.log(`> Нарезаю продукты: ${products.join(`, `)}`);
+  return new Promise((resolve) => {
+    setTimeout(() => {
+      console.log(`> Продукты нарезаны!`);
+      resolve(products);
+    }, TIMEOUT);
+  });
+};
+
+const makeSoup = (preparedProducts) => {
+  console.log(`> Начинаю варить суп из: ${preparedProducts.join(`, `)}`);
+  return new Promise((resolve, reject) => {
+    setTimeout(() => {
+      return Math.random() > 0.5
+        ? resolve(`> Суп готов!`)
+        : reject(`> Упс! Сломалась плита.`);
+    }, TIMEOUT);
+  });
+};
+
+buyProducts()
+  .then(prepareProducts)
+  .then(makeSoup)
+  .then((result) => console.log(result))
+  .catch((err) => console.log(err));
+
diff --git a/02-async/03-promises/03-hello-promise.js b/02-async/03-promises/03-hello-promise.js
new file mode 100644
index 0000000..f84a8e0
--- /dev/null
+++ b/02-async/03-promises/03-hello-promise.js
@@ -0,0 +1,9 @@
+'use strict';
+
+// Функция-исполнитель (executor) выполняется сразу.
+
+const myPromise = new Promise((resolve, reject) => {
+  console.log(`Привет! Я функция-исполнитель.`);
+
+  // Другой код
+});
diff --git a/02-async/03-promises/04-catch.js b/02-async/03-promises/04-catch.js
new file mode 100644
index 0000000..c7cb1f2
--- /dev/null
+++ b/02-async/03-promises/04-catch.js
@@ -0,0 +1,9 @@
+'use strict';
+
+const myPromise = new Promise(() => {
+  throw new Error(`Упс! Бросили исключение.`);
+});
+
+// Перехватываем исключение в методе `catch`.
+myPromise
+  .catch((error) => console.log(error.message));
diff --git a/02-async/03-promises/05-no-async-throw-in-catch.js b/02-async/03-promises/05-no-async-throw-in-catch.js
new file mode 100644
index 0000000..5edfcca
--- /dev/null
+++ b/02-async/03-promises/05-no-async-throw-in-catch.js
@@ -0,0 +1,18 @@
+'use strict';
+
+const TIMEOUT = 1000;
+
+// Здесь не получится перехватить исключение
+const mySecondPromise = new Promise((resolve, reject) => {
+  setTimeout(() => {
+    throw new Error(`Ошибка в асинхронной функции`);
+  },
+  TIMEOUT
+  );
+});
+
+// Исключение, выброшенное из асинхронной функции поймать
+// методом catch() не получится.
+mySecondPromise
+  .catch(() => console.log(`Этот код не будет выполнен`));
+
diff --git a/02-async/03-promises/06-catch-in-chain.js b/02-async/03-promises/06-catch-in-chain.js
new file mode 100644
index 0000000..01eeedf
--- /dev/null
+++ b/02-async/03-promises/06-catch-in-chain.js
@@ -0,0 +1,32 @@
+'use strict';
+
+const firstPromise = new Promise((resolve, reject) => {
+  resolve(`Первый промис пошёл...`);
+});
+
+const secondPromise = new Promise((resolve, reject) => {
+  resolve(`Второй промис пошёл...`);
+});
+
+const thirdPromise = new Promise((resolve, reject) => {
+  reject(`Ох и ах, не взлетел...`);
+});
+
+const fourthPromise = new Promise((resolve, reject) => {
+  resolve(`Четвёртый пошёл...`);
+});
+
+firstPromise
+  .then((value) => {
+    console.log(value);
+    return secondPromise;
+  })
+  .then((value) => {
+    console.log(value);
+    return thirdPromise;
+  })
+  .then((value) => {
+    console.log(value);
+    return fourthPromise;
+  })
+  .catch((error) => console.log(error));
diff --git a/02-async/03-promises/07-resolve-not-reject.js b/02-async/03-promises/07-resolve-not-reject.js
new file mode 100644
index 0000000..a2f01a1
--- /dev/null
+++ b/02-async/03-promises/07-resolve-not-reject.js
@@ -0,0 +1,11 @@
+'use strict';
+
+const myPromise = new Promise((resolve, reject) => {
+  resolve(`success`);
+  reject(`error`);
+});
+
+myPromise
+  .then((value) => console.log(value))
+  .catch((error) => console.log(error));
+
diff --git a/02-async/03-promises/08-resolve-and-reject.js b/02-async/03-promises/08-resolve-and-reject.js
new file mode 100644
index 0000000..6a0a808
--- /dev/null
+++ b/02-async/03-promises/08-resolve-and-reject.js
@@ -0,0 +1,9 @@
+'use strict';
+
+const getRemoteData = () => Promise.resolve(`Данные загружены!`);
+const getBadData = () => Promise.reject(`Произошла ошибка`);
+
+getRemoteData()
+  .then((value) => console.log(value))
+  .then(getBadData)
+  .catch((error) => console.log(error));
diff --git a/02-async/03-promises/09-promise-all.js b/02-async/03-promises/09-promise-all.js
new file mode 100644
index 0000000..a45659e
--- /dev/null
+++ b/02-async/03-promises/09-promise-all.js
@@ -0,0 +1,23 @@
+'use strict';
+
+const TIMEOUT = 1000;
+
+const makeThing = (number) => {
+  return new Promise((resolve, reject) => {
+    setTimeout(() => {
+      resolve(`Это действие №${number}`);
+    }, TIMEOUT);
+  });
+};
+
+const firstThing = makeThing(1);
+const secondThing = makeThing(2);
+const thirdThing = makeThing(3);
+
+Promise
+  .all([
+    thirdThing,
+    firstThing,
+    secondThing,
+  ])
+  .then((value) => console.log(value));
diff --git a/02-async/03-promises/10-promise-race.js b/02-async/03-promises/10-promise-race.js
new file mode 100644
index 0000000..564b5b3
--- /dev/null
+++ b/02-async/03-promises/10-promise-race.js
@@ -0,0 +1,23 @@
+'use strict';
+
+const TIMEOUT = 1000;
+
+const makeThing = (number) => {
+  return new Promise((resolve, reject) => {
+    setTimeout(() => {
+      resolve(`Это действие №${number}`);
+    }, TIMEOUT);
+  });
+};
+
+const firstThing = makeThing(1);
+const secondThing = makeThing(2);
+const thirdThing = makeThing(3);
+
+Promise
+  .race([
+    thirdThing,
+    firstThing,
+    secondThing,
+  ])
+  .then((value) => console.log(value));
diff --git a/02-async/03-promises/11-print-dir-callbacks.js b/02-async/03-promises/11-print-dir-callbacks.js
new file mode 100644
index 0000000..9045d1b
--- /dev/null
+++ b/02-async/03-promises/11-print-dir-callbacks.js
@@ -0,0 +1,16 @@
+'use strict';
+
+const fs = require(`fs`);
+
+const printDir = (path) => {
+  fs.readdir(path, (err, files) => {
+    if (err) {
+      throw err;
+    }
+
+    files.forEach((file) => console.log(file));
+  });
+};
+
+printDir(__dirname);
+
diff --git a/02-async/03-promises/12-print-dir-promisify.js b/02-async/03-promises/12-print-dir-promisify.js
new file mode 100644
index 0000000..7efd999
--- /dev/null
+++ b/02-async/03-promises/12-print-dir-promisify.js
@@ -0,0 +1,22 @@
+'use strict';
+
+const fs = require(`fs`);
+
+const promisify = (fn) => {
+  return (...args) => {
+    return new Promise((resolve, reject) => {
+      fn(...args, (err, data) => {
+        if (err) {
+          return reject(err);
+        }
+
+        return resolve(data);
+      });
+    });
+  };
+};
+
+const readdir = promisify(fs.readdir);
+readdir(__dirname)
+  .then((files) => files.forEach((file) => console.log(file)))
+  .catch((err) => console.error(err));
diff --git a/02-async/03-promises/13-print-dir-native-promisify.js b/02-async/03-promises/13-print-dir-native-promisify.js
new file mode 100644
index 0000000..d748faa
--- /dev/null
+++ b/02-async/03-promises/13-print-dir-native-promisify.js
@@ -0,0 +1,10 @@
+'use strict';
+
+const fs = require(`fs`);
+const util = require(`util`);
+
+const readdir = util.promisify(fs.readdir);
+
+readdir(__dirname)
+  .then((files) => files.forEach((file) => console.log(file)))
+  .catch((err) => console.error(err));
diff --git a/02-async/03-promises/readme.md b/02-async/03-promises/readme.md
new file mode 100644
index 0000000..d78d7de
--- /dev/null
+++ b/02-async/03-promises/readme.md
@@ -0,0 +1 @@
+# Глава 2.3 Введение в промисы
\ No newline at end of file
diff --git a/02-async/05-async-await/05-async-await-catch.js b/02-async/05-async-await/05-async-await-catch.js
new file mode 100644
index 0000000..67bf62f
--- /dev/null
+++ b/02-async/05-async-await/05-async-await-catch.js
@@ -0,0 +1,19 @@
+'use strict';
+
+const fs = require(`fs`);
+const util = require(`util`);
+
+const printFiles = async (path) => {
+  const readdir = util.promisify(fs.readdir);
+
+  try {
+    const files = await readdir(path);
+    console.log(files);
+  } catch (error) {
+    console.log(`Произошла ошибка: ${error}`);
+  }
+};
+
+
+printFiles(``);
+console.log(`Список файлов: `);
diff --git a/02-async/05-async-await/05-async-function-return.js b/02-async/05-async-await/05-async-function-return.js
new file mode 100644
index 0000000..a26d569
--- /dev/null
+++ b/02-async/05-async-await/05-async-function-return.js
@@ -0,0 +1,6 @@
+'use strict';
+
+const foo = async () => `Hello, world`;
+
+foo()
+  .then((text) => console.log(text)); // Hello, world
diff --git a/02-async/05-async-await/05-async-functions.js b/02-async/05-async-await/05-async-functions.js
new file mode 100644
index 0000000..d632198
--- /dev/null
+++ b/02-async/05-async-await/05-async-functions.js
@@ -0,0 +1,12 @@
+'use strict';
+
+async function foo() {
+  // Применение async для функции объявленной декларативно
+}
+
+const boo = async () => {
+  // Применение async для функции объявленной в виде выражения
+}
+
+console.log(foo()); // Promise
+console.log(boo()); // Promise
diff --git a/02-async/05-async-await/05-await.js b/02-async/05-async-await/05-await.js
new file mode 100644
index 0000000..bf8b3b1
--- /dev/null
+++ b/02-async/05-async-await/05-await.js
@@ -0,0 +1,15 @@
+'use strict';
+
+const fs = require(`fs`);
+const util = require(`util`);
+
+const printFiles = async (path) => {
+  const readdir = util.promisify(fs.readdir);
+  const files = await readdir(path);
+
+  console.log(files);
+};
+
+
+printFiles(__dirname);
+console.log(`Список файлов: `);
diff --git a/02-async/05-async-await/readme.md b/02-async/05-async-await/readme.md
new file mode 100644
index 0000000..855e769
--- /dev/null
+++ b/02-async/05-async-await/readme.md
@@ -0,0 +1 @@
+# Глава 2.5 Async/await
\ No newline at end of file
diff --git a/02-async/06-event-loop/01-call-stack.js b/02-async/06-event-loop/01-call-stack.js
new file mode 100644
index 0000000..353b37f
--- /dev/null
+++ b/02-async/06-event-loop/01-call-stack.js
@@ -0,0 +1,21 @@
+'use strict';
+
+const getCountTaks = (todoList) => todoList.length;
+
+const getBasicTodo = () => {
+  return [
+    `Проснуться`,
+    `Позавтракать`,
+    `Почитать книгу`,
+    `Узнать как работает JavaScript`,
+    `Отдохнуть`,
+  ];
+};
+
+const print = (todoList) => {
+  todoList.forEach((todo) => console.log(todo));
+};
+
+const myTodoList = getBasicTodo();
+console.log(`Всего задач: ${getCountTaks(myTodoList)}.`);
+print(myTodoList);
diff --git a/02-async/06-event-loop/02-block-io.js b/02-async/06-event-loop/02-block-io.js
new file mode 100644
index 0000000..12c2d2a
--- /dev/null
+++ b/02-async/06-event-loop/02-block-io.js
@@ -0,0 +1,10 @@
+'use strict';
+
+const ITEMS_COUNT = 100000;
+
+console.log(`Начинается длительная операция...`);
+
+Array(ITEMS_COUNT).fill(``)
+  .forEach((it, index) => console.log(`Выполняю итерацию №${index}.`));
+
+console.log(`Результат вычисления: ${2 * 2}`);
diff --git a/02-async/06-event-loop/03-async-for-each.js b/02-async/06-event-loop/03-async-for-each.js
new file mode 100644
index 0000000..4a11416
--- /dev/null
+++ b/02-async/06-event-loop/03-async-for-each.js
@@ -0,0 +1,10 @@
+'use strict';
+
+console.log(`Начинается длительная операция...`);
+
+const mockArray = Array(100000).fill(``);
+setTimeout(() => mockArray
+  .forEach((it, index) => console.log(`Выполняю итерацию №${index}.`)), 0);
+
+console.log(`Длительная операция завершена!`);
+
diff --git a/02-async/06-event-loop/readme.md b/02-async/06-event-loop/readme.md
new file mode 100644
index 0000000..61a190a
--- /dev/null
+++ b/02-async/06-event-loop/readme.md
@@ -0,0 +1 @@
+# Глава 2.6 Event Loop
\ No newline at end of file
diff --git a/02-async/08-http-server/01-http-server.js b/02-async/08-http-server/01-http-server.js
new file mode 100644
index 0000000..e9cc3b6
--- /dev/null
+++ b/02-async/08-http-server/01-http-server.js
@@ -0,0 +1,19 @@
+'use strict';
+
+const http = require(`http`);
+
+const onClientConnect = (request, response) => {
+  const userAgent = request.headers[`user-agent`];
+  response.end(`Hello, ${userAgent}!`);
+};
+
+const port = 8000;
+const httpServer = http.createServer(onClientConnect);
+
+httpServer.listen(port, () => {
+  console.info(`Принимаю подключения на ${port}`);
+});
+
+httpServer.on(`error`, ({message}) => {
+  console.error(`Ошибка: ${message}`);
+});
diff --git a/02-async/08-http-server/02-http-server-part-2.js b/02-async/08-http-server/02-http-server-part-2.js
new file mode 100644
index 0000000..cf2e3e4
--- /dev/null
+++ b/02-async/08-http-server/02-http-server-part-2.js
@@ -0,0 +1,25 @@
+'use strict';
+
+const http = require(`http`);
+
+const HTTP_SUCCESS_CODE = 200;
+
+const onClientConnect = (request, response) => {
+  const userAgent = request.headers[`user-agent`];
+  response.writeHead(HTTP_SUCCESS_CODE, {
+    'Content-Type': `text/plain`,
+  });
+
+  response.end(`Hello, ${userAgent}!`);
+};
+
+const port = 8000;
+const httpServer = http.createServer(onClientConnect);
+
+httpServer.listen(port, () => {
+  console.info(`Принимаю подключения на ${port}`);
+});
+
+httpServer.on(`error`, ({message}) => {
+  console.error(`Ошибка: ${message}`);
+});
diff --git a/02-async/08-http-server/03-http-server-part-3.js b/02-async/08-http-server/03-http-server-part-3.js
new file mode 100644
index 0000000..8a82aae
--- /dev/null
+++ b/02-async/08-http-server/03-http-server-part-3.js
@@ -0,0 +1,38 @@
+'use strict';
+
+const http = require(`http`);
+
+const HTTP_SUCCESS_CODE = 200;
+
+const onClientConnect = (request, response) => {
+  const userAgent = request.headers[`user-agent`];
+  const responseText = `
+    <!DOCTYPE html>
+    <html lang="ru">
+      <head>
+        <title>From Node.js with love!</title>
+      </head>
+      <body>
+        <h1>Привет!</h1>
+        <p>Ты используешь: ${userAgent}.</p>
+      </body>
+    </html>
+  `;
+
+  response.writeHead(HTTP_SUCCESS_CODE, {
+    'Content-Type': `text/html; charset=UTF-8`,
+  });
+
+  response.end(responseText);
+};
+
+const port = 8000;
+const httpServer = http.createServer(onClientConnect);
+
+httpServer.listen(port, () => {
+  console.info(`Принимаю подключения на ${port}`);
+});
+
+httpServer.on(`error`, ({message}) => {
+  console.error(`Ошибка: ${message}`);
+});
diff --git a/02-async/08-http-server/04-http-server-part-4.js b/02-async/08-http-server/04-http-server-part-4.js
new file mode 100644
index 0000000..2e1db03
--- /dev/null
+++ b/02-async/08-http-server/04-http-server-part-4.js
@@ -0,0 +1,73 @@
+'use strict';
+
+const http = require(`http`);
+
+const HTTP_SUCCESS_CODE = 200;
+const HTTP_NOT_FOUND_CODE = 404;
+
+const styles = `
+  h1 {
+    color: red;
+    font-size: 24px;
+  }
+
+  p {
+    color: green;
+    font-size: 16px;
+  }
+`;
+
+const getResponseText = (userAgent) => (`
+  <!DOCTYPE html>
+    <html lang="ru">
+      <head>
+        <title>From Node with love!</title>
+        <link rel="stylesheet" href="https://github.com/style.css">
+      </head>
+      <body>
+        <h1>Привет!</h1>
+        <p>Ты используешь: ${userAgent}.</p>
+      </body>
+    </html>
+`);
+
+const onClientConnect = (request, response) => {
+  switch (request.url) {
+
+    case `/style.css`:
+      response.writeHead(HTTP_SUCCESS_CODE, {
+        'Content-Type': `text/css; charset=UTF-8`,
+      });
+
+      response.end(styles);
+      break;
+
+    case `/`:
+      const userAgent = request.headers[`user-agent`];
+      const responseText = getResponseText(userAgent);
+
+      response.writeHead(HTTP_SUCCESS_CODE, {
+        'Content-Type': `text/html; charset=UTF-8`,
+      });
+
+      response.end(responseText);
+      break;
+
+    default:
+      response.writeHead(HTTP_NOT_FOUND_CODE, {
+        'Content-Type': `text/plain; charset=UTF-8`,
+      });
+      response.end(`Упс, ничего не найдено.`);
+  }
+};
+
+const port = 8000;
+const httpServer = http.createServer(onClientConnect);
+
+httpServer.listen(port, () => {
+  console.info(`Принимаю подключения на ${port}`);
+});
+
+httpServer.on(`error`, ({message}) => {
+  console.error(`Ошибка: ${message}`);
+});
diff --git a/02-async/08-http-server/readme.md b/02-async/08-http-server/readme.md
new file mode 100644
index 0000000..ebd9667
--- /dev/null
+++ b/02-async/08-http-server/readme.md
@@ -0,0 +1 @@
+# Глава 2.8 HTTP-сервер
\ No newline at end of file
diff --git a/03-express/02-express/02-hello-express.js b/03-express/02-express/02-hello-express.js
new file mode 100644
index 0000000..0afd64a
--- /dev/null
+++ b/03-express/02-express/02-hello-express.js
@@ -0,0 +1,10 @@
+'use strict';
+
+const express = require(`express`);
+const DEFAULT_PORT = 3000;
+
+const app = express();
+
+app.get(`/`, (req, res) => res.send(`Hello, Express.js!`));
+app.listen(DEFAULT_PORT,
+    () => console.log(`Сервер запущен на порту: ${DEFAULT_PORT}`));
diff --git a/03-express/02-express/package-lock.json b/03-express/02-express/package-lock.json
new file mode 100644
index 0000000..ef4f111
--- /dev/null
+++ b/03-express/02-express/package-lock.json
@@ -0,0 +1,374 @@
+{
+  "name": "02-express",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "accepts": {
+      "version": "1.3.7",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
+      "integrity": "sha512-Il80Qs2WjYlJIBNzNkK6KYqlVMTbZLXgHx2oT0pU/fjRHyEp+PEfEPY0R3WCwAGVOtauxh1hOxNgIf5bv7dQpA==",
+      "requires": {
+        "mime-types": "~2.1.24",
+        "negotiator": "0.6.2"
+      }
+    },
+    "array-flatten": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
+      "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
+    },
+    "body-parser": {
+      "version": "1.19.0",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.19.0.tgz",
+      "integrity": "sha512-dhEPs72UPbDnAQJ9ZKMNTP6ptJaionhP5cBb541nXPlW60Jepo9RV/a4fX4XWW9CuFNK22krhrj1+rgzifNCsw==",
+      "requires": {
+        "bytes": "3.1.0",
+        "content-type": "~1.0.4",
+        "debug": "2.6.9",
+        "depd": "~1.1.2",
+        "http-errors": "1.7.2",
+        "iconv-lite": "0.4.24",
+        "on-finished": "~2.3.0",
+        "qs": "6.7.0",
+        "raw-body": "2.4.0",
+        "type-is": "~1.6.17"
+      }
+    },
+    "bytes": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.0.tgz",
+      "integrity": "sha512-zauLjrfCG+xvoyaqLoV8bLVXXNGC4JqlxFCutSDWA6fJrTo2ZuvLYTqZ7aHBLZSMOopbzwv8f+wZcVzfVTI2Dg=="
+    },
+    "content-disposition": {
+      "version": "0.5.3",
+      "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.3.tgz",
+      "integrity": "sha512-ExO0774ikEObIAEV9kDo50o+79VCUdEB6n6lzKgGwupcVeRlhrj3qGAfwq8G6uBJjkqLrhT0qEYFcWng8z1z0g==",
+      "requires": {
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+      }
+    },
+    "content-type": {
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+      "resolved": "https://registry.npmjs.org/content-type/-/content-type-1.0.4.tgz",
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+    },
+    "cookie": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.4.0.tgz",
+      "integrity": "sha512-+Hp8fLp57wnUSt0tY0tHEXh4voZRDnoIrZPqlo3DPiI4y9lwg/jqx+1Om94/W6ZaPDOUbnjOt/99w66zk+l1Xg=="
+    },
+    "cookie-signature": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
+      "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw="
+    },
+    "debug": {
+      "version": "2.6.9",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
+      "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
+      "requires": {
+        "ms": "2.0.0"
+      }
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+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/depd/-/depd-1.1.2.tgz",
+      "integrity": "sha1-m81S4UwJd2PnSbJ0xDRu0uVgtak="
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+    "destroy": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/destroy/-/destroy-1.0.4.tgz",
+      "integrity": "sha1-l4hXRCxEdJ5CBmE+N5RiBYJqvYA="
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+      "integrity": "sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0="
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+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/encodeurl/-/encodeurl-1.0.2.tgz",
+      "integrity": "sha1-rT/0yG7C0CkyL1oCw6mmBslbP1k="
+    },
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+      "version": "1.0.3",
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+      "integrity": "sha1-Aljq5NPQwJdN4cFpGI7wBR0dGYg="
+    },
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+      "integrity": "sha1-Qa4u62XvpiJorr/qg6x9eSmbCIc="
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+      "version": "4.17.1",
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+      "requires": {
+        "accepts": "~1.3.7",
+        "array-flatten": "1.1.1",
+        "body-parser": "1.19.0",
+        "content-disposition": "0.5.3",
+        "content-type": "~1.0.4",
+        "cookie": "0.4.0",
+        "cookie-signature": "1.0.6",
+        "debug": "2.6.9",
+        "depd": "~1.1.2",
+        "encodeurl": "~1.0.2",
+        "escape-html": "~1.0.3",
+        "etag": "~1.8.1",
+        "finalhandler": "~1.1.2",
+        "fresh": "0.5.2",
+        "merge-descriptors": "1.0.1",
+        "methods": "~1.1.2",
+        "on-finished": "~2.3.0",
+        "parseurl": "~1.3.3",
+        "path-to-regexp": "0.1.7",
+        "proxy-addr": "~2.0.5",
+        "qs": "6.7.0",
+        "range-parser": "~1.2.1",
+        "safe-buffer": "5.1.2",
+        "send": "0.17.1",
+        "serve-static": "1.14.1",
+        "setprototypeof": "1.1.1",
+        "statuses": "~1.5.0",
+        "type-is": "~1.6.18",
+        "utils-merge": "1.0.1",
+        "vary": "~1.1.2"
+      }
+    },
+    "finalhandler": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.1.2.tgz",
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+        "encodeurl": "~1.0.2",
+        "escape-html": "~1.0.3",
+        "on-finished": "~2.3.0",
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+        "statuses": "~1.5.0",
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+      "requires": {
+        "safer-buffer": ">= 2.1.2 < 3"
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+    "inherits": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.3.tgz",
+      "integrity": "sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4="
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diff --git a/03-express/02-express/package.json b/03-express/02-express/package.json
new file mode 100644
index 0000000..3c8adb8
--- /dev/null
+++ b/03-express/02-express/package.json
@@ -0,0 +1,15 @@
+{
+  "name": "02-express",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "4.17.1"
+  }
+}
diff --git a/03-express/03-params/01-http-query-string.http b/03-express/03-params/01-http-query-string.http
new file mode 100644
index 0000000..e16a070
--- /dev/null
+++ b/03-express/03-params/01-http-query-string.http
@@ -0,0 +1,11 @@
+# Получить все комментариев к публикациям
+GET https://jsonplaceholder.typicode.com/comments HTTP/1.1
+Content-Type: application/json
+
+###
+
+## Получить комментарии для публикации с идентификатором 1
+GET https://jsonplaceholder.typicode.com/comments?postId=1 HTTP/1.1
+Content-Type: application/json
+
+###
diff --git a/03-express/03-params/02-express-and-query-string.http b/03-express/03-params/02-express-and-query-string.http
new file mode 100644
index 0000000..923c9e2
--- /dev/null
+++ b/03-express/03-params/02-express-and-query-string.http
@@ -0,0 +1,25 @@
+# Передача параметров
+GET http://localhost:3000/?company=HTMLAcademy&site=https://htmlacademy.ru HTTP/1.1
+
+###
+
+# Передача массива параметров
+GET http://localhost:3000/?brands[]=apple&brands[]=lenovo&brands[]=asus HTTP/1.1
+
+###
+
+# Отправка JSON объекта
+POST http://localhost:3000/company
+Content-Type: application/json
+
+{
+  "name": "HTML Academy",
+  "site": "https://htmlacademy.ru/",
+  "instagram": "https://www.instagram.com/htmlacademy/",
+  "twitter": "https://twitter.com/htmlacademy_ru"
+}
+
+###
+
+# Именованные параметры
+GET http://localhost:3000/company/0
diff --git a/03-express/03-params/02-express-and-query-string.js b/03-express/03-params/02-express-and-query-string.js
new file mode 100644
index 0000000..3900600
--- /dev/null
+++ b/03-express/03-params/02-express-and-query-string.js
@@ -0,0 +1,41 @@
+'use strict';
+
+const express = require(`express`);
+
+const app = express();
+app.use(express.json());
+
+const port = 3000;
+
+const companies = [
+  `HTML Academy`,
+  `Microsoft`,
+  `Google`,
+];
+
+// Строка запроса
+app.get(`/`, (req, res) => {
+  // Вывод содержимого строки запроса
+  console.log(req.query);
+  res.send(req.query);
+});
+
+// Тело запроса
+app.post(`/company`, (req, res) => {
+  console.log(req.body);
+  res.send(req.body);
+});
+
+// Именованные параметры
+app.get(`/company/:id`, (req, res) => {
+  const companyId = Number.parseInt(req.params.id, 10);
+
+  if (!companies[companyId]) {
+    return res.status(404).send(`Not Found`);
+  }
+
+  return res.send(companies[companyId]);
+});
+
+
+app.listen(port);
diff --git a/03-express/03-params/package-lock.json b/03-express/03-params/package-lock.json
new file mode 100644
index 0000000..f7719e0
--- /dev/null
+++ b/03-express/03-params/package-lock.json
@@ -0,0 +1,374 @@
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+        "qs": "6.7.0",
+        "raw-body": "2.4.0",
+        "type-is": "~1.6.17"
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diff --git a/03-express/03-params/package.json b/03-express/03-params/package.json
new file mode 100644
index 0000000..6ff7abf
--- /dev/null
+++ b/03-express/03-params/package.json
@@ -0,0 +1,15 @@
+{
+  "name": "02-express-and-query-string",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "4.17.1"
+  }
+}
diff --git a/03-express/04-routing/01-http-methods-and-routes/01-http-methods-and-routes.http b/03-express/04-routing/01-http-methods-and-routes/01-http-methods-and-routes.http
new file mode 100644
index 0000000..7ddad71
--- /dev/null
+++ b/03-express/04-routing/01-http-methods-and-routes/01-http-methods-and-routes.http
@@ -0,0 +1,23 @@
+
+#  Пример POST-запроса
+POST http://localhost:3000/company HTTP/1.1
+###
+
+#  Пример PATCH-запроса
+PATCH http://localhost:3000/company HTTP/1.1
+###
+
+#  Пример DELETE-запроса
+DELETE http://localhost:3000/company HTTP/1.1
+###
+
+#  Пример PUT-запроса
+PUT http://localhost:3000/company HTTP/1.1
+###
+
+# Маршрут в виде регулярного выражения (page[0-9]+)
+GET http://localhost:3000/page0 HTTP/1.1
+###
+
+# Маршрут в виде регулярного выражения (page[0-9]+)
+GET http://localhost:3000/page1000 HTTP/1.1
diff --git a/03-express/04-routing/01-http-methods-and-routes/01-http-methods-and-routes.js b/03-express/04-routing/01-http-methods-and-routes/01-http-methods-and-routes.js
new file mode 100644
index 0000000..8d26168
--- /dev/null
+++ b/03-express/04-routing/01-http-methods-and-routes/01-http-methods-and-routes.js
@@ -0,0 +1,22 @@
+'use strict';
+
+const express = require(`express`);
+const bodyParser = require(`body-parser`);
+
+const app = express();
+app.use(bodyParser.json());
+
+const port = 3000;
+app.listen(port);
+
+// POST
+app.post(`/company`, (req, res) => res.send(`OK`));
+// PATCH
+app.patch(`/company`, (req, res) => res.send(`OK`));
+// PUT
+app.put(`/company`, (req, res) => res.send(`OK`));
+// DELETE
+app.delete(`/company`, (req, res) => res.send(`OK`));
+
+// Маршрут в виде регулярного выражения
+app.get(`/page[0-9]+`, (req, res) => res.send(`Yes, it's a valid url!`));
diff --git a/03-express/04-routing/01-http-methods-and-routes/package-lock.json b/03-express/04-routing/01-http-methods-and-routes/package-lock.json
new file mode 100644
index 0000000..0792878
--- /dev/null
+++ b/03-express/04-routing/01-http-methods-and-routes/package-lock.json
@@ -0,0 +1,379 @@
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+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/body-parse/-/body-parse-0.1.0.tgz",
+      "integrity": "sha512-k0PDF7vZZpspXlwoM8ywh9PIHZokooS0Rek4M8Vekoro7XuuaWVhjgTpdzIRrfKj5oLQahwjn621/4kG4d91xw=="
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diff --git a/03-express/04-routing/01-http-methods-and-routes/package.json b/03-express/04-routing/01-http-methods-and-routes/package.json
new file mode 100644
index 0000000..b521a00
--- /dev/null
+++ b/03-express/04-routing/01-http-methods-and-routes/package.json
@@ -0,0 +1,17 @@
+{
+  "name": "01-http-methods-and-routes",
+  "version": "1.0.0",
+  "description": "",
+  "main": "01-http-methods-and-routes.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "body-parse": "0.1.0",
+    "body-parser": "1.19.0",
+    "express": "4.17.1"
+  }
+}
diff --git a/03-express/04-routing/02-router/02-router.js b/03-express/04-routing/02-router/02-router.js
new file mode 100644
index 0000000..20b6bb3
--- /dev/null
+++ b/03-express/04-routing/02-router/02-router.js
@@ -0,0 +1,14 @@
+'use strict';
+
+const express = require(`express`);
+const newsRoutes = require(`./routes/news`);
+const companyRoutes = require(`./routes/company`);
+
+const app = express();
+
+app.use(`/news`, newsRoutes);
+app.use(`/company`, companyRoutes);
+
+const port = 3000;
+app.listen(port);
+
diff --git a/03-express/04-routing/02-router/package-lock.json b/03-express/04-routing/02-router/package-lock.json
new file mode 100644
index 0000000..764ff42
--- /dev/null
+++ b/03-express/04-routing/02-router/package-lock.json
@@ -0,0 +1,379 @@
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+      "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-0.1.7.tgz",
+      "integrity": "sha1-32BBeABfUi8V60SQ5yR6G/qmf4w="
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+      "requires": {
+        "forwarded": "~0.1.2",
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+        "iconv-lite": "0.4.24",
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+      "version": "0.17.1",
+      "resolved": "https://registry.npmjs.org/send/-/send-0.17.1.tgz",
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+        "debug": "2.6.9",
+        "depd": "~1.1.2",
+        "destroy": "~1.0.4",
+        "encodeurl": "~1.0.2",
+        "escape-html": "~1.0.3",
+        "etag": "~1.8.1",
+        "fresh": "0.5.2",
+        "http-errors": "~1.7.2",
+        "mime": "1.6.0",
+        "ms": "2.1.1",
+        "on-finished": "~2.3.0",
+        "range-parser": "~1.2.1",
+        "statuses": "~1.5.0"
+      },
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+        }
+      }
+    },
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+      "version": "1.14.1",
+      "resolved": "https://registry.npmjs.org/serve-static/-/serve-static-1.14.1.tgz",
+      "integrity": "sha512-JMrvUwE54emCYWlTI+hGrGv5I8dEwmco/00EvkzIIsR7MqrHonbD9pO2MOfFnpFntl7ecpZs+3mW+XbQZu9QCg==",
+      "requires": {
+        "encodeurl": "~1.0.2",
+        "escape-html": "~1.0.3",
+        "parseurl": "~1.3.3",
+        "send": "0.17.1"
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+        "media-typer": "0.3.0",
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+      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
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+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
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+  }
+}
diff --git a/03-express/04-routing/02-router/package.json b/03-express/04-routing/02-router/package.json
new file mode 100644
index 0000000..c2d958b
--- /dev/null
+++ b/03-express/04-routing/02-router/package.json
@@ -0,0 +1,17 @@
+{
+  "name": "02-router",
+  "version": "1.0.0",
+  "description": "",
+  "main": "02-router.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "body-parse": "0.1.0",
+    "body-parser": "1.19.0",
+    "express": "4.17.1"
+  }
+}
diff --git a/03-express/04-routing/02-router/routes/company.js b/03-express/04-routing/02-router/routes/company.js
new file mode 100644
index 0000000..dd3bbd8
--- /dev/null
+++ b/03-express/04-routing/02-router/routes/company.js
@@ -0,0 +1,11 @@
+'use strict';
+
+const {Router} = require(`express`);
+const companyRouter = new Router();
+
+companyRouter.get(`/`, (req, res) => res.send(`/company`));
+companyRouter.get(`/contacts`, (req, res) => res.send(`/company/contacts`));
+companyRouter.get(`/feedback`, (req, res) => res.send(`/company/feedback`));
+companyRouter.get(`/news`, (req, res) => res.send(`/company/news`));
+
+module.exports = companyRouter;
diff --git a/03-express/04-routing/02-router/routes/news.js b/03-express/04-routing/02-router/routes/news.js
new file mode 100644
index 0000000..cc9f5b6
--- /dev/null
+++ b/03-express/04-routing/02-router/routes/news.js
@@ -0,0 +1,10 @@
+'use strict';
+
+const {Router} = require(`express`);
+const newsRouter = new Router();
+
+newsRouter.get(`/`, (req, res) => res.send(`/news`));
+newsRouter.get(`/general`, (req, res) => res.send(`/news/general`));
+newsRouter.get(`/:id`, (req, res) => res.send(`/news/:id ${req.params.id}`));
+
+module.exports = newsRouter;
diff --git a/03-express/05-middleware/05-error-handle.js b/03-express/05-middleware/05-error-handle.js
new file mode 100644
index 0000000..231ba77
--- /dev/null
+++ b/03-express/05-middleware/05-error-handle.js
@@ -0,0 +1,17 @@
+'use strict';
+
+const express = require(`express`);
+const app = express();
+
+const port = 3000;
+app.listen(port);
+
+app.get(`/`, (req, res) => {
+  throw new Error(`Oops!`);
+});
+
+app.use((err, req, res, next) => {
+  res
+    .status(500)
+    .send(`Ой, что-то сломалось`);
+});
diff --git a/03-express/05-middleware/05-intro-middleware.js b/03-express/05-middleware/05-intro-middleware.js
new file mode 100644
index 0000000..cbb9efb
--- /dev/null
+++ b/03-express/05-middleware/05-intro-middleware.js
@@ -0,0 +1,30 @@
+'use strict';
+
+const express = require(`express`);
+const app = express();
+
+const port = 3000;
+app.listen(port);
+
+// Опишем с помощью middleware обработчики
+// двух маршрутов.
+
+// Корневой маршрут
+app.use((req, res, next) => {
+  if (req.path === `/`) {
+    res.send(`Hello`);
+  }
+
+  // Передаём эстафетную палочку следующему
+  // middleware
+  next();
+});
+
+// Маршрут /keks
+app.use((req, res, next) => {
+  if (req.path === `/keks`) {
+    res.send(`Hello. I'am Keks`);
+  }
+
+  next();
+});
diff --git a/03-express/05-middleware/05-middleware-app-method.js b/03-express/05-middleware/05-middleware-app-method.js
new file mode 100644
index 0000000..b18d011
--- /dev/null
+++ b/03-express/05-middleware/05-middleware-app-method.js
@@ -0,0 +1,22 @@
+'use strict';
+
+const express = require(`express`);
+const app = express();
+
+const port = 3000;
+app.listen(port);
+
+// Регистрируем два одинаковых маршрута
+app.get(`/:id`, (req, res, next) => {
+  const id = +req.params.id;
+  if (id === 100) {
+    res.send(`Hey, superhero!`);
+  } else {
+    next();
+  }
+});
+
+app.get(`/:id`, (req, res) => {
+  const {id} = req.params;
+  res.send(`Your id === ${id}`);
+});
diff --git a/03-express/05-middleware/05-static.js b/03-express/05-middleware/05-static.js
new file mode 100644
index 0000000..c02f025
--- /dev/null
+++ b/03-express/05-middleware/05-static.js
@@ -0,0 +1,26 @@
+'use strict';
+
+const express = require(`express`);
+
+const PUBLIC_DIR = `public`;
+
+const app = express();
+const port = 3000;
+app.listen(port);
+
+app.use(express.static(PUBLIC_DIR));
+
+const getContent = () => (`<!doctype html>
+  <html lang="ru">
+    <head>
+      <title>Hello, world</title>
+      <link rel="stylesheet" href="https://github.com/css/style.css">
+    </head>
+    <body>
+      <h1>Hello, world!</h1>
+    </body>
+`);
+
+app.get(`/`, (req, res) => {
+  res.send(getContent());
+});
diff --git a/03-express/05-middleware/05-time-middleware.js b/03-express/05-middleware/05-time-middleware.js
new file mode 100644
index 0000000..507569d
--- /dev/null
+++ b/03-express/05-middleware/05-time-middleware.js
@@ -0,0 +1,35 @@
+'use strict';
+
+const express = require(`express`);
+const app = express();
+
+const port = 3000;
+app.listen(port);
+
+app.use((req, res, next) => {
+  console.log(`${req.method} ${req.path} — ${new Date().toLocaleTimeString()}`);
+  next();
+});
+
+// Опишем с помощью middleware обработчики
+// двух маршрутов.
+
+// Корневой маршрут
+app.use((req, res, next) => {
+  if (req.path === `/`) {
+    res.send(`Hello`);
+  }
+
+  // Передаём эстафетную палочку следующему
+  // middleware
+  next();
+});
+
+// Маршрут /keks
+app.use((req, res, next) => {
+  if (req.path === `/keks`) {
+    res.send(`Hello. I'am Keks`);
+  }
+
+  next();
+});
diff --git a/03-express/05-middleware/package-lock.json b/03-express/05-middleware/package-lock.json
new file mode 100644
index 0000000..1783451
--- /dev/null
+++ b/03-express/05-middleware/package-lock.json
@@ -0,0 +1,374 @@
+{
+  "name": "05-middleware",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "accepts": {
+      "version": "1.3.7",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
+      "integrity": "sha512-Il80Qs2WjYlJIBNzNkK6KYqlVMTbZLXgHx2oT0pU/fjRHyEp+PEfEPY0R3WCwAGVOtauxh1hOxNgIf5bv7dQpA==",
+      "requires": {
+        "mime-types": "~2.1.24",
+        "negotiator": "0.6.2"
+      }
+    },
+    "array-flatten": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
+      "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
+    },
+    "body-parser": {
+      "version": "1.19.0",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.19.0.tgz",
+      "integrity": "sha512-dhEPs72UPbDnAQJ9ZKMNTP6ptJaionhP5cBb541nXPlW60Jepo9RV/a4fX4XWW9CuFNK22krhrj1+rgzifNCsw==",
+      "requires": {
+        "bytes": "3.1.0",
+        "content-type": "~1.0.4",
+        "debug": "2.6.9",
+        "depd": "~1.1.2",
+        "http-errors": "1.7.2",
+        "iconv-lite": "0.4.24",
+        "on-finished": "~2.3.0",
+        "qs": "6.7.0",
+        "raw-body": "2.4.0",
+        "type-is": "~1.6.17"
+      }
+    },
+    "bytes": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.0.tgz",
+      "integrity": "sha512-zauLjrfCG+xvoyaqLoV8bLVXXNGC4JqlxFCutSDWA6fJrTo2ZuvLYTqZ7aHBLZSMOopbzwv8f+wZcVzfVTI2Dg=="
+    },
+    "content-disposition": {
+      "version": "0.5.3",
+      "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.3.tgz",
+      "integrity": "sha512-ExO0774ikEObIAEV9kDo50o+79VCUdEB6n6lzKgGwupcVeRlhrj3qGAfwq8G6uBJjkqLrhT0qEYFcWng8z1z0g==",
+      "requires": {
+        "safe-buffer": "5.1.2"
+      }
+    },
+    "content-type": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/content-type/-/content-type-1.0.4.tgz",
+      "integrity": "sha512-hIP3EEPs8tB9AT1L+NUqtwOAps4mk2Zob89MWXMHjHWg9milF/j4osnnQLXBCBFBk/tvIG/tUc9mOUJiPBhPXA=="
+    },
+    "cookie": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.4.0.tgz",
+      "integrity": "sha512-+Hp8fLp57wnUSt0tY0tHEXh4voZRDnoIrZPqlo3DPiI4y9lwg/jqx+1Om94/W6ZaPDOUbnjOt/99w66zk+l1Xg=="
+    },
+    "cookie-signature": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
+      "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw="
+    },
+    "debug": {
+      "version": "2.6.9",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
+      "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
+      "requires": {
+        "ms": "2.0.0"
+      }
+    },
+    "depd": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/depd/-/depd-1.1.2.tgz",
+      "integrity": "sha1-m81S4UwJd2PnSbJ0xDRu0uVgtak="
+    },
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+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/destroy/-/destroy-1.0.4.tgz",
+      "integrity": "sha1-l4hXRCxEdJ5CBmE+N5RiBYJqvYA="
+    },
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+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/ee-first/-/ee-first-1.1.1.tgz",
+      "integrity": "sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0="
+    },
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+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/encodeurl/-/encodeurl-1.0.2.tgz",
+      "integrity": "sha1-rT/0yG7C0CkyL1oCw6mmBslbP1k="
+    },
+    "escape-html": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/escape-html/-/escape-html-1.0.3.tgz",
+      "integrity": "sha1-Aljq5NPQwJdN4cFpGI7wBR0dGYg="
+    },
+    "etag": {
+      "version": "1.8.1",
+      "resolved": "https://registry.npmjs.org/etag/-/etag-1.8.1.tgz",
+      "integrity": "sha1-Qa4u62XvpiJorr/qg6x9eSmbCIc="
+    },
+    "express": {
+      "version": "4.17.1",
+      "resolved": "https://registry.npmjs.org/express/-/express-4.17.1.tgz",
+      "integrity": "sha512-mHJ9O79RqluphRrcw2X/GTh3k9tVv8YcoyY4Kkh4WDMUYKRZUq0h1o0w2rrrxBqM7VoeUVqgb27xlEMXTnYt4g==",
+      "requires": {
+        "accepts": "~1.3.7",
+        "array-flatten": "1.1.1",
+        "body-parser": "1.19.0",
+        "content-disposition": "0.5.3",
+        "content-type": "~1.0.4",
+        "cookie": "0.4.0",
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+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
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+}
diff --git a/03-express/05-middleware/package.json b/03-express/05-middleware/package.json
new file mode 100644
index 0000000..faa9240
--- /dev/null
+++ b/03-express/05-middleware/package.json
@@ -0,0 +1,15 @@
+{
+  "name": "05-middleware",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "4.17.1"
+  }
+}
diff --git a/03-express/05-middleware/public/css/style.css b/03-express/05-middleware/public/css/style.css
new file mode 100644
index 0000000..6fb39cd
--- /dev/null
+++ b/03-express/05-middleware/public/css/style.css
@@ -0,0 +1,7 @@
+body {
+  background-color: #cccccc;
+}
+
+h1 {
+  color: rgb(46, 31, 85);
+}
diff --git a/03-express/06-templates/06-hello-pug.js b/03-express/06-templates/06-hello-pug.js
new file mode 100644
index 0000000..fa7b047
--- /dev/null
+++ b/03-express/06-templates/06-hello-pug.js
@@ -0,0 +1,37 @@
+'use strict';
+
+const express = require(`express`);
+
+const app = express();
+const port = 3000;
+app.listen(port);
+
+app.set(`views`, `./templates`);
+app.set(`view engine`, `pug`);
+
+app.get(`/`, (req, res) => {
+  const pageContent = {
+    title: `Main Page`,
+    header: `Шаблонизатор в действии`,
+    description: `Страница сформирована при помощи шаблонизатора Pug`
+  };
+
+  res.render(`index`, pageContent);
+});
+
+app.get(`/emails`, (req, res) => {
+  const pageContent = {
+    title: `Emails list`,
+    header: `Контакты`,
+    emails: [
+      `test@mail.ru`,
+      `keks@htmlacademy.ru`,
+    ],
+  };
+
+  res.render(`emails`, pageContent);
+});
+
+app.get(`/page`, (req, res) => {
+  res.render(`page`, {title: `Пример заголовка страницы`});
+});
diff --git a/03-express/06-templates/package-lock.json b/03-express/06-templates/package-lock.json
new file mode 100644
index 0000000..f0c58fe
--- /dev/null
+++ b/03-express/06-templates/package-lock.json
@@ -0,0 +1,833 @@
+{
+  "name": "06-templates",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@types/babel-types": {
+      "version": "7.0.7",
+      "resolved": "https://registry.npmjs.org/@types/babel-types/-/babel-types-7.0.7.tgz",
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+    },
+    "@types/babylon": {
+      "version": "6.16.5",
+      "resolved": "https://registry.npmjs.org/@types/babylon/-/babylon-6.16.5.tgz",
+      "integrity": "sha512-xH2e58elpj1X4ynnKp9qSnWlsRTIs6n3tgLGNfwAGHwePw0mulHQllV34n0T25uYSu1k0hRKkWXF890B1yS47w==",
+      "requires": {
+        "@types/babel-types": "*"
+      }
+    },
+    "accepts": {
+      "version": "1.3.7",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
+      "integrity": "sha512-Il80Qs2WjYlJIBNzNkK6KYqlVMTbZLXgHx2oT0pU/fjRHyEp+PEfEPY0R3WCwAGVOtauxh1hOxNgIf5bv7dQpA==",
+      "requires": {
+        "mime-types": "~2.1.24",
+        "negotiator": "0.6.2"
+      }
+    },
+    "acorn": {
+      "version": "3.3.0",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-3.3.0.tgz",
+      "integrity": "sha1-ReN/s56No/JbruP/U2niu18iAXo="
+    },
+    "acorn-globals": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/acorn-globals/-/acorn-globals-3.1.0.tgz",
+      "integrity": "sha1-/YJw9x+7SZawBPqIDuXUZXOnMb8=",
+      "requires": {
+        "acorn": "^4.0.4"
+      },
+      "dependencies": {
+        "acorn": {
+          "version": "4.0.13",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-4.0.13.tgz",
+          "integrity": "sha1-EFSVrlNh1pe9GVyCUZLhrX8lN4c="
+        }
+      }
+    },
+    "align-text": {
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/align-text/-/align-text-0.1.4.tgz",
+      "integrity": "sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=",
+      "requires": {
+        "kind-of": "^3.0.2",
+        "longest": "^1.0.1",
+        "repeat-string": "^1.5.2"
+      }
+    },
+    "array-flatten": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
+      "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
+    },
+    "asap": {
+      "version": "2.0.6",
+      "resolved": "https://registry.npmjs.org/asap/-/asap-2.0.6.tgz",
+      "integrity": "sha1-5QNHYR1+aQlDIIu9r+vLwvuGbUY="
+    },
+    "babel-runtime": {
+      "version": "6.26.0",
+      "resolved": "https://registry.npmjs.org/babel-runtime/-/babel-runtime-6.26.0.tgz",
+      "integrity": "sha1-llxwWGaOgrVde/4E/yM3vItWR/4=",
+      "requires": {
+        "core-js": "^2.4.0",
+        "regenerator-runtime": "^0.11.0"
+      }
+    },
+    "babel-types": {
+      "version": "6.26.0",
+      "resolved": "https://registry.npmjs.org/babel-types/-/babel-types-6.26.0.tgz",
+      "integrity": "sha1-o7Bz+Uq0nrb6Vc1lInozQ4BjJJc=",
+      "requires": {
+        "babel-runtime": "^6.26.0",
+        "esutils": "^2.0.2",
+        "lodash": "^4.17.4",
+        "to-fast-properties": "^1.0.3"
+      }
+    },
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+      "version": "6.18.0",
+      "resolved": "https://registry.npmjs.org/babylon/-/babylon-6.18.0.tgz",
+      "integrity": "sha512-q/UEjfGJ2Cm3oKV71DJz9d25TPnq5rhBVL2Q4fA5wcC3jcrdn7+SssEybFIxwAvvP+YCsCYNKughoF33GxgycQ=="
+    },
+    "body-parser": {
+      "version": "1.19.0",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.19.0.tgz",
+      "integrity": "sha512-dhEPs72UPbDnAQJ9ZKMNTP6ptJaionhP5cBb541nXPlW60Jepo9RV/a4fX4XWW9CuFNK22krhrj1+rgzifNCsw==",
+      "requires": {
+        "bytes": "3.1.0",
+        "content-type": "~1.0.4",
+        "debug": "2.6.9",
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+}
diff --git a/03-express/06-templates/package.json b/03-express/06-templates/package.json
new file mode 100644
index 0000000..ac400f6
--- /dev/null
+++ b/03-express/06-templates/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "06-templates",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "4.17.1",
+    "pug": "2.0.4"
+  }
+}
diff --git a/03-express/06-templates/templates/emails.pug b/03-express/06-templates/templates/emails.pug
new file mode 100644
index 0000000..dd650b4
--- /dev/null
+++ b/03-express/06-templates/templates/emails.pug
@@ -0,0 +1,8 @@
+html
+  head
+    title= title
+  body
+    h1= header
+    ul
+      each email in emails
+        li=email
diff --git a/03-express/06-templates/templates/footer.pug b/03-express/06-templates/templates/footer.pug
new file mode 100644
index 0000000..fbdc4ba
--- /dev/null
+++ b/03-express/06-templates/templates/footer.pug
@@ -0,0 +1,5 @@
+footer
+  p
+    | Это текст из подвала.
+    | Содержимое подвала описывается в отдельном шаблоне,
+    | а затем подключается в `layout.pug`
diff --git a/03-express/06-templates/templates/index.pug b/03-express/06-templates/templates/index.pug
new file mode 100644
index 0000000..f45f59a
--- /dev/null
+++ b/03-express/06-templates/templates/index.pug
@@ -0,0 +1,6 @@
+html
+  head
+    title= title
+  body
+    h1= header
+    p= description
diff --git a/03-express/06-templates/templates/layout.pug b/03-express/06-templates/templates/layout.pug
new file mode 100644
index 0000000..7a844d7
--- /dev/null
+++ b/03-express/06-templates/templates/layout.pug
@@ -0,0 +1,6 @@
+html(lang='ru')
+  head
+    title= title
+  body
+    block content
+  include footer.pug
diff --git a/03-express/06-templates/templates/page.pug b/03-express/06-templates/templates/page.pug
new file mode 100644
index 0000000..fd496a9
--- /dev/null
+++ b/03-express/06-templates/templates/page.pug
@@ -0,0 +1,4 @@
+extends layout.pug
+
+block content
+  h1= title
diff --git a/03-express/07-forms/07-forms-and-files.js b/03-express/07-forms/07-forms-and-files.js
new file mode 100644
index 0000000..2e9fae6
--- /dev/null
+++ b/03-express/07-forms/07-forms-and-files.js
@@ -0,0 +1,100 @@
+'use strict';
+
+const express = require(`express`);
+const fs = require(`fs`).promises;
+const formidableMiddleware = require(`express-formidable`);
+
+const PUBLIC_DIR = `avatars`;
+
+const app = express();
+const port = 3000;
+
+app.use(formidableMiddleware({
+  encoding: `utf-8`,
+  uploadDir: `./tmp`,
+  multiples: false,
+}));
+
+
+app.use(express.static(PUBLIC_DIR));
+
+app.listen(port);
+
+const getContent = () => (`<!doctype html>
+  <html lang="ru">
+    <head>
+      <title>Hello, world</title>
+      <style>
+        form {
+          display: flex;
+          justify-content: center;
+          flex-grow: 1;
+          flex-direction: column;
+          width: 500px;
+        }
+
+        label {
+          font-weight: bold;
+          margin-bottom: 2px;
+          display: block;
+        }
+
+        input {
+          border: 1px solid #ccc;
+          margin: 3px 0;
+          padding: 5px;
+        }
+
+        button {
+          width: 100px;
+          margin-top: 10px;
+        }
+        </style>
+    </head>
+    <body>
+      <h1>Express и формы</h1>
+      <form action="https://github.com/form" method="POST" enctype="multipart/form-data">
+        <label for="firstname">Имя:</label>
+        <input id="firstname" name="firstname" />
+
+        <label for="photo">Фотография:</label>
+        <input type="file" id="photo" name="photo" />
+
+        <button type="submit">Отправить</button>
+      </form>
+    </body>
+`);
+
+const getAvatarPage = (path) => (`<!doctype html>
+  <html lang="ru">
+    <head>
+      <title>Your avatar</title>
+    </head>
+  <body>
+    <h1>Your avatar</h1>
+    <img src="https://github.com/$%7Bpath%7D" />
+  </body>
+  </html>`
+);
+
+app.get(`/form`, (req, res) => {
+  res.send(getContent());
+});
+
+app.post(`/form`, async (req, res) => {
+  const {type, size, path, name} = req.files.photo;
+  const allowTypes = [`image/jpeg`, `image/png`];
+
+  if (size === 0 || !allowTypes.includes(type)) {
+    fs.unlink(path);
+    return res.redirect(`/form`);
+  }
+
+  try {
+    await fs.rename(path, `./avatars/${name}`);
+  } catch (error) {
+    return res.send(`Oops! Error: ${error.message}`);
+  }
+
+  return res.send(getAvatarPage(name));
+});
diff --git a/03-express/07-forms/07-forms-save-to-file.js b/03-express/07-forms/07-forms-save-to-file.js
new file mode 100644
index 0000000..752ab31
--- /dev/null
+++ b/03-express/07-forms/07-forms-save-to-file.js
@@ -0,0 +1,77 @@
+'use strict';
+
+const express = require(`express`);
+const fs = require(`fs`).promises;
+
+const app = express();
+const port = 3000;
+
+app.use(express.urlencoded({extended: false}));
+app.listen(port);
+
+const getContent = () => (`<!doctype html>
+  <html lang="ru">
+    <head>
+      <title>Hello, world</title>
+      <style>
+        form {
+          display: flex;
+          justify-content: center;
+          flex-grow: 1;
+          flex-direction: column;
+          width: 500px;
+        }
+
+        label {
+          font-weight: bold;
+          margin-bottom: 2px;
+          display: block;
+        }
+
+        input {
+          border: 1px solid #ccc;
+          margin: 3px 0;
+          padding: 5px;
+        }
+
+        button {
+          width: 100px;
+          margin-top: 10px;
+        }
+        </style>
+    </head>
+    <body>
+      <h1>Express и формы</h1>
+      <form action="https://github.com/form" method="POST">
+        <label for="firstname">Имя:</label>
+        <input id="firstname" name="firstname">
+
+        <label for="lastname">Фамилия:</label>
+        <input id="lastname" name="lastname">
+
+        <label for="email">Email:</label>
+        <input id="email" name="email">
+
+        <label for="comment">Комментарий</label>
+        <textarea id="comment" name="comment"></textarea>
+        <button type="submit">Отправить</button>
+      </form>
+    </body>
+`);
+
+app.get(`/form`, (req, res) => {
+  res.send(getContent());
+});
+
+app.post(`/form`, async (req, res) => {
+  const reviewForm = req.body;
+  const jsonForm = JSON.stringify(reviewForm);
+  const fileName = `form-${Date.now()}.json`;
+
+  try {
+    await fs.writeFile(`./${fileName}`, jsonForm);
+    res.send(`Ваши данные успешно сохранены в файл ${fileName}`);
+  } catch (err) {
+    res.send(`Возникла ошибка сохранения: ${err.message}`);
+  }
+});
diff --git a/03-express/07-forms/07-forms.js b/03-express/07-forms/07-forms.js
new file mode 100644
index 0000000..dba254d
--- /dev/null
+++ b/03-express/07-forms/07-forms.js
@@ -0,0 +1,67 @@
+'use strict';
+
+const express = require(`express`);
+
+const app = express();
+const port = 3000;
+
+app.use(express.urlencoded({extended: false}));
+app.listen(port);
+
+const getContent = () => (`<!doctype html>
+  <html lang="ru">
+    <head>
+      <title>Hello, world</title>
+      <style>
+        form {
+          display: flex;
+          justify-content: center;
+          flex-grow: 1;
+          flex-direction: column;
+          width: 500px;
+        }
+
+        label {
+          font-weight: bold;
+          margin-bottom: 2px;
+          display: block;
+        }
+
+        input {
+          border: 1px solid #ccc;
+          margin: 3px 0;
+          padding: 5px;
+        }
+
+        button {
+          width: 100px;
+          margin-top: 10px;
+        }
+        </style>
+    </head>
+    <body>
+      <h1>Express и формы</h1>
+      <form action="https://github.com/form" method="POST">
+        <label for="firstname">Имя:</label>
+        <input id="firstname" name="firstname" />
+
+        <label for="lastname">Фамилия:</label>
+        <input id="lastname" name="lastname" />
+
+        <label for="email">Email:</label>
+        <input id="email" name="email" />
+
+        <label for="comment">Комментарий</label>
+        <textarea id="comment" name="comment"></textarea>
+        <button type="submit">Отправить</button>
+      </form>
+    </body>
+`);
+
+app.get(`/form`, (req, res) => {
+  res.send(getContent());
+});
+
+app.post(`/form`, (req, res) => {
+  console.log(req.body);
+});
diff --git a/03-express/07-forms/10-image-upload/app.js b/03-express/07-forms/10-image-upload/app.js
new file mode 100644
index 0000000..56e1822
--- /dev/null
+++ b/03-express/07-forms/10-image-upload/app.js
@@ -0,0 +1,50 @@
+'use strict';
+
+const express = require(`express`);
+const multer = require(`multer`);
+const {nanoid} = require(`nanoid`);
+const path = require(`path`);
+
+const PORT = 3000;
+const PUBLIC_DIR = `public`;
+const UPLOAD_DIR = path.join(__dirname, `public/images`);
+
+const MimeTypeExtension = {
+    'image/png': 'png',
+    'image/jpeg': 'jpg',
+    'image/jpg': 'jpg',
+}
+
+// Подготовка хранилища для сохранения файлов
+const storage = multer.diskStorage({
+    destination: (req, file, cb) => cb(null, UPLOAD_DIR),
+    filename: (req, file, cb) => {
+        const fileExtention = MimeTypeExtension[file.mimetype];
+        cb(null, `${nanoid()}.${fileExtention}`)
+    },
+});
+
+// Функция определяет допустимые файлы для загрузки
+const fileFilter = (req, file, cb) => {
+    const allowTypes = Object.keys(MimeTypeExtension);
+    const isValid = allowTypes.includes(file.mimetype);
+    cb(null, isValid);
+}
+
+const upload = multer({ storage, fileFilter, limits: {
+    fileSize: 5 * 1024 * 1024
+ }
+});
+
+const app = express();
+
+app.use(express.static(PUBLIC_DIR));
+app.post(`/upload`, upload.single(`avatar`), (req, res) => {
+    const {file} = req;
+
+    // В file вся необходимая информация о файле
+    console.log(file);
+    res.redirect(`/`);
+});
+
+app.listen(PORT);
diff --git a/03-express/07-forms/10-image-upload/package-lock.json b/03-express/07-forms/10-image-upload/package-lock.json
new file mode 100644
index 0000000..5a07fcd
--- /dev/null
+++ b/03-express/07-forms/10-image-upload/package-lock.json
@@ -0,0 +1,531 @@
+{
+  "name": "10-image-upload",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "accepts": {
+      "version": "1.3.7",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
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+      "requires": {
+        "mime-types": "~2.1.24",
+        "negotiator": "0.6.2"
+      }
+    },
+    "append-field": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/append-field/-/append-field-1.0.0.tgz",
+      "integrity": "sha1-HjRA6RXwsSA9I3SOeO3XubW0PlY="
+    },
+    "array-flatten": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
+      "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
+    },
+    "body-parser": {
+      "version": "1.19.0",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.19.0.tgz",
+      "integrity": "sha512-dhEPs72UPbDnAQJ9ZKMNTP6ptJaionhP5cBb541nXPlW60Jepo9RV/a4fX4XWW9CuFNK22krhrj1+rgzifNCsw==",
+      "requires": {
+        "bytes": "3.1.0",
+        "content-type": "~1.0.4",
+        "debug": "2.6.9",
+        "depd": "~1.1.2",
+        "http-errors": "1.7.2",
+        "iconv-lite": "0.4.24",
+        "on-finished": "~2.3.0",
+        "qs": "6.7.0",
+        "raw-body": "2.4.0",
+        "type-is": "~1.6.17"
+      }
+    },
+    "buffer-from": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.1.1.tgz",
+      "integrity": "sha512-MQcXEUbCKtEo7bhqEs6560Hyd4XaovZlO/k9V3hjVUF/zwW7KBVdSK4gIt/bzwS9MbR5qob+F5jusZsb0YQK2A=="
+    },
+    "busboy": {
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+        "inherits": "^2.0.3",
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+        "typedarray": "^0.0.6"
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+            "process-nextick-args": "~2.0.0",
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diff --git a/03-express/07-forms/10-image-upload/package.json b/03-express/07-forms/10-image-upload/package.json
new file mode 100644
index 0000000..c8fd97c
--- /dev/null
+++ b/03-express/07-forms/10-image-upload/package.json
@@ -0,0 +1,17 @@
+{
+  "name": "10-image-upload",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "4.17.1",
+    "multer": "1.4.2",
+    "nanoid": "3.1.10"
+  }
+}
diff --git a/03-express/07-forms/10-image-upload/public/index.html b/03-express/07-forms/10-image-upload/public/index.html
new file mode 100644
index 0000000..cc34835
--- /dev/null
+++ b/03-express/07-forms/10-image-upload/public/index.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="ru">
+<head>
+    <title>Upload image via Multer</title>
+    <meta charset="utf-8" />
+</head>
+<body>
+    <h1>Загрузить изображение</h1>
+    <form action="https://github.com/upload" method="post" enctype="multipart/form-data">
+        <input type="file" name="avatar">
+        <input type="submit" value="Отправить">
+    </form>
+</body>
+<html>
diff --git a/03-express/07-forms/package-lock.json b/03-express/07-forms/package-lock.json
new file mode 100644
index 0000000..63bc67b
--- /dev/null
+++ b/03-express/07-forms/package-lock.json
@@ -0,0 +1,387 @@
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+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
+      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
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+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
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+}
diff --git a/03-express/07-forms/package.json b/03-express/07-forms/package.json
new file mode 100644
index 0000000..375e55a
--- /dev/null
+++ b/03-express/07-forms/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "07-forms",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "4.17.1",
+    "express-formidable": "1.2.0"
+  }
+}
diff --git a/03-express/11-axios/01-get-external-ip.js b/03-express/11-axios/01-get-external-ip.js
new file mode 100644
index 0000000..3b69d1c
--- /dev/null
+++ b/03-express/11-axios/01-get-external-ip.js
@@ -0,0 +1,41 @@
+const https = require('https');
+
+const URL_API = `https://api.ipify.org/?format=json`
+
+const getExternalIp = async () => {
+  return new Promise((resolve, reject) => {
+
+	// Функция-обратного вызова. Сработает
+    // при получении ответа.
+    const callback = (stream) => {
+      let data = ``;
+
+	  // читаем поток данных (stream)
+      stream.on(`data`, (chunk) => {
+        data += chunk;
+      });
+
+			// после завершения, обработаем ответ целиком
+      stream.on(`end`, () => {
+        resolve(JSON.parse(data));
+      });
+
+      stream.on(`error`, (err) => {
+        reject(err)
+      });
+    }
+
+    const req = https.get(URL_API, callback)
+
+	// в случае ошибки отменим промис
+    req.on(`error`, (err) => {
+      reject(err)
+    });
+
+    req.end();
+  })
+
+}
+
+getExternalIp()
+  .then(console.log)
diff --git a/03-express/11-axios/02-get-posts.js b/03-express/11-axios/02-get-posts.js
new file mode 100644
index 0000000..d5ce28f
--- /dev/null
+++ b/03-express/11-axios/02-get-posts.js
@@ -0,0 +1,13 @@
+const axios = require(`axios`);
+
+const URL_API = `https://jsonplaceholder.typicode.com/posts`
+
+axios({
+  method: `get`,
+  url: URL_API,
+}).then((response) => {
+  console.log(`Status code ${response.status}`)
+  console.log(`Count posts ${response.data.length}`)
+}).catch(err => {
+  console.log(`Error: ${err.message}`)
+});
diff --git a/03-express/11-axios/03-axios-method-get.js b/03-express/11-axios/03-axios-method-get.js
new file mode 100644
index 0000000..828f1fb
--- /dev/null
+++ b/03-express/11-axios/03-axios-method-get.js
@@ -0,0 +1,12 @@
+const axios = require(`axios`);
+
+const URL_API = `https://jsonplaceholder.typicode.com/posts`
+
+axios.get(URL_API , {timeout: 1000})
+  .then((response) => {
+    console.log(`Status code ${response.status}`)
+    console.log(`Count posts ${response.data.length}`)
+  })
+  .catch((err) => {
+    console.log(`Error: ${err.message}`)
+  })
diff --git a/03-express/11-axios/04-axios-method-post.js b/03-express/11-axios/04-axios-method-post.js
new file mode 100644
index 0000000..e0081c0
--- /dev/null
+++ b/03-express/11-axios/04-axios-method-post.js
@@ -0,0 +1,18 @@
+const axios = require(`axios`);
+
+const URL_API = `https://jsonplaceholder.typicode.com/posts`
+
+const newPost = {
+    title: `foo`,
+    body: `bar`,
+    userId: 1,
+}
+
+axios.post(URL_API, newPost, {timeout: 1000})
+  .then((response) => {
+    console.log(`Status code ${response.status}`)
+    console.log(response.data)
+  })
+  .catch((err) => {
+    console.log(`Error: ${err.message}`)
+  });
diff --git a/03-express/11-axios/05-axios-cath-error.js b/03-express/11-axios/05-axios-cath-error.js
new file mode 100644
index 0000000..e0f60c6
--- /dev/null
+++ b/03-express/11-axios/05-axios-cath-error.js
@@ -0,0 +1,9 @@
+const axios = require(`axios`);
+
+axios.get(`https://example.dom`, {timeout: 1000})
+  .then((response) => {
+    console.log(`Status code ${response.status}`)
+  })
+  .catch((err) => {
+    console.log(`Error: ${err.message}`)
+  });
diff --git a/03-express/11-axios/package-lock.json b/03-express/11-axios/package-lock.json
new file mode 100644
index 0000000..d3a39af
--- /dev/null
+++ b/03-express/11-axios/package-lock.json
@@ -0,0 +1,4330 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@babel/code-frame": {
+      "version": "7.12.13",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.12.13.tgz",
+      "integrity": "sha512-HV1Cm0Q3ZrpCR93tkWOYiuYIgLxZXZFVG2VgK+MBWjUqZTundupbfx2aXarXuw5Ko5aMcjtJgbSs4vUGBS5v6g==",
+      "requires": {
+        "@babel/highlight": "^7.12.13"
+      }
+    },
+    "@babel/compat-data": {
+      "version": "7.13.12",
+      "resolved": "https://registry.npmjs.org/@babel/compat-data/-/compat-data-7.13.12.tgz",
+      "integrity": "sha512-3eJJ841uKxeV8dcN/2yGEUy+RfgQspPEgQat85umsE1rotuquQ2AbIub4S6j7c50a2d+4myc+zSlnXeIHrOnhQ=="
+    },
+    "@babel/core": {
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+      "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-3.0.0.tgz",
+      "integrity": "sha512-A5CUptxDsvxKJEU3yO6DuWBSJz/qizqzJKOMIfUJHETbBw/sFaDxgd6fxm1ewUaM0jZ444Fc5vC5ROYurg/4Pw=="
+    },
+    "xmlchars": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/xmlchars/-/xmlchars-2.2.0.tgz",
+      "integrity": "sha512-JZnDKK8B0RCDw84FNdDAIpZK+JuJw+s7Lz8nksI7SIuU3UXJJslUthsi+uWBUYOwPFwW7W7PRLRfUKpxjtjFCw=="
+    },
+    "y18n": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.1.tgz",
+      "integrity": "sha512-wNcy4NvjMYL8gogWWYAO7ZFWFfHcbdbE57tZO8e4cbpj8tfUcwrwqSl3ad8HxpYWCdXcJUCeKKZS62Av1affwQ=="
+    },
+    "yallist": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
+    },
+    "yargs": {
+      "version": "15.4.1",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-15.4.1.tgz",
+      "integrity": "sha512-aePbxDmcYW++PaqBsJ+HYUFwCdv4LVvdnhBy78E57PIor8/OVvhMrADFFEDh8DHDFRv/O9i3lPhsENjO7QX0+A==",
+      "requires": {
+        "cliui": "^6.0.0",
+        "decamelize": "^1.2.0",
+        "find-up": "^4.1.0",
+        "get-caller-file": "^2.0.1",
+        "require-directory": "^2.1.1",
+        "require-main-filename": "^2.0.0",
+        "set-blocking": "^2.0.0",
+        "string-width": "^4.2.0",
+        "which-module": "^2.0.0",
+        "y18n": "^4.0.0",
+        "yargs-parser": "^18.1.2"
+      }
+    },
+    "yargs-parser": {
+      "version": "18.1.3",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-18.1.3.tgz",
+      "integrity": "sha512-o50j0JeToy/4K6OZcaQmW6lyXXKhq7csREXcDwk2omFPJEwUNOVtJKvmDr9EI1fAJZUyZcRF7kxGBWmRXudrCQ==",
+      "requires": {
+        "camelcase": "^5.0.0",
+        "decamelize": "^1.2.0"
+      }
+    }
+  }
+}
diff --git a/03-express/11-axios/package.json b/03-express/11-axios/package.json
new file mode 100644
index 0000000..24e65f1
--- /dev/null
+++ b/03-express/11-axios/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "description": "",
+  "main": "01-get-external-ip.js",
+  "dependencies": {
+    "axios": "0.21.1",
+    "jest": "^26.6.3"
+  },
+  "devDependencies": {},
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC"
+}
diff --git a/04-logs-and-tests/02-logging/01-console-log-and-error.js b/04-logs-and-tests/02-logging/01-console-log-and-error.js
new file mode 100644
index 0000000..63e57b8
--- /dev/null
+++ b/04-logs-and-tests/02-logging/01-console-log-and-error.js
@@ -0,0 +1,4 @@
+'use strict';
+
+console.log(`Какой-то текст…`);
+console.error(`Какая-то ошибка…`);
diff --git a/04-logs-and-tests/02-logging/02-log-express.js b/04-logs-and-tests/02-logging/02-log-express.js
new file mode 100644
index 0000000..ba17b0a
--- /dev/null
+++ b/04-logs-and-tests/02-logging/02-log-express.js
@@ -0,0 +1,15 @@
+'use strict';
+
+const express = require(`express`);
+const PORT = 3000;
+
+const app = express();
+app.listen(PORT);
+
+app.get(`/`, (req, res) => {
+  res.send(`Hello World`);
+});
+
+app.use((req, res) => {
+  res.status(404).send(`Page not found`);
+});
diff --git a/04-logs-and-tests/02-logging/03-log-express.js b/04-logs-and-tests/02-logging/03-log-express.js
new file mode 100644
index 0000000..3862fc6
--- /dev/null
+++ b/04-logs-and-tests/02-logging/03-log-express.js
@@ -0,0 +1,32 @@
+'use strict';
+
+const express = require(`express`);
+const PORT = 3000;
+const app = express();
+
+app.use((req, res, next) => {
+  console.log(`Start request to url ${req.url}`);
+  next();
+});
+
+app.get(`/`, (req, res) => {
+  res.send(`Hello World`);
+
+  // Фиксируем успех завершения запроса
+  console.log(`End request with status code ${res.statusCode}`);
+});
+
+app.use((req, res) => {
+  res.status(404).send(`Page not found`);
+
+  // Фиксируем неудачу. Маршрут не зарегистрирован
+  console.error(`End request with error ${res.statusCode}`);
+});
+
+app.listen(PORT, () => {
+  // Регистрируем запуск сервера
+  console.log(`server start on ${PORT}`);
+}).on(`error`, (err) => {
+  // Логируем ошибку, если сервер не смог стартовать
+  console.error(`Server can't start. Error: ${err}`);
+});
diff --git a/04-logs-and-tests/03-pino/01-hello-pino.js b/04-logs-and-tests/03-pino/01-hello-pino.js
new file mode 100644
index 0000000..20496c8
--- /dev/null
+++ b/04-logs-and-tests/03-pino/01-hello-pino.js
@@ -0,0 +1,7 @@
+'use strict';
+
+const logger = require(`pino`)();
+
+logger.info(`Hello, world!`);
+logger.warn(`Test warning`);
+logger.error(`Add error`);
diff --git a/04-logs-and-tests/03-pino/02-pino-and-express.js b/04-logs-and-tests/03-pino/02-pino-and-express.js
new file mode 100644
index 0000000..c540c79
--- /dev/null
+++ b/04-logs-and-tests/03-pino/02-pino-and-express.js
@@ -0,0 +1,39 @@
+'use strict';
+
+const express = require(`express`);
+const PORT = 3000;
+const app = express();
+
+// Инициализируем логгер
+const logger = require(`pino`)({
+  name: `pino-and-express`,
+
+  // Позволяем управлять уровнем логирования через переменные окружения
+  level: process.env.LOG_LEVEL || `info`
+});
+
+app.use((req, res, next) => {
+  logger.debug(`Start request to url ${req.url}`);
+  next();
+});
+
+app.get(`/`, (req, res) => {
+  // Записываем успех завершения запроса
+  logger.info(`End request with status code ${res.statusCode}`);
+  res.send(`Hello World`);
+});
+
+app.use((req, res) => {
+  res.status(404).send(`Page not found`);
+  // Записываем, что запрос закончился неудачей
+  logger.error(`End request with error ${res.statusCode}`);
+});
+
+app.listen(PORT, () => {
+  // Регистрируем запуск сервера
+  logger.info(`server start on ${PORT}`);
+})
+.on(`error`, (err) => {
+  // Логируем ошибку, если сервер не смог стартовать
+  logger.error(`Server can't start. Error: ${err}`);
+});
diff --git a/04-logs-and-tests/03-pino/03-refactoring/logger.js b/04-logs-and-tests/03-pino/03-refactoring/logger.js
new file mode 100644
index 0000000..8be7095
--- /dev/null
+++ b/04-logs-and-tests/03-pino/03-refactoring/logger.js
@@ -0,0 +1,16 @@
+'use strict';
+
+const logger = require(`pino`)({
+  name: `pino-and-express`,
+  level: process.env.LOG_LEVEL || `info`
+});
+
+module.exports = {
+  logger,
+  // Метод всегда возвращает новый логгер, унаследованный
+  // от стандартного логгера. В метод можно передать
+  // специфичные настройки для нового экземпляра класса.
+  getLogger(options = {}) {
+    return logger.child(options);
+  }
+};
diff --git a/04-logs-and-tests/03-pino/03-refactoring/package-lock.json b/04-logs-and-tests/03-pino/03-refactoring/package-lock.json
new file mode 100644
index 0000000..663970f
--- /dev/null
+++ b/04-logs-and-tests/03-pino/03-refactoring/package-lock.json
@@ -0,0 +1,270 @@
+{
+  "name": "sample-chapter-4",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@hapi/bourne": {
+      "version": "1.3.2",
+      "resolved": "https://registry.npmjs.org/@hapi/bourne/-/bourne-1.3.2.tgz",
+      "integrity": "sha512-1dVNHT76Uu5N3eJNTYcvxee+jzX4Z9lfciqRRHCU27ihbUcYi+iSc2iml5Ke1LXe1SyJCLA0+14Jh4tXJgOppA==",
+      "dev": true
+    },
+    "ansi-styles": {
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+      "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+      "dev": true,
+      "requires": {
+        "color-convert": "^1.9.0"
+      }
+    },
+    "args": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/args/-/args-5.0.1.tgz",
+      "integrity": "sha512-1kqmFCFsPffavQFGt8OxJdIcETti99kySRUPMpOhaGjL6mRJn8HFU1OxKY5bMqfZKUwTQc1mZkAjmGYaVOHFtQ==",
+      "dev": true,
+      "requires": {
+        "camelcase": "5.0.0",
+        "chalk": "2.4.2",
+        "leven": "2.1.0",
+        "mri": "1.1.4"
+      }
+    },
+    "camelcase": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-5.0.0.tgz",
+      "integrity": "sha512-faqwZqnWxbxn+F1d399ygeamQNy3lPp/H9H6rNrqYh4FSVCtcY+3cub1MxA8o9mDd55mM8Aghuu/kuyYA6VTsA==",
+      "dev": true
+    },
+    "chalk": {
+      "version": "2.4.2",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
+      "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
+      "dev": true,
+      "requires": {
+        "ansi-styles": "^3.2.1",
+        "escape-string-regexp": "^1.0.5",
+        "supports-color": "^5.3.0"
+      }
+    },
+    "color-convert": {
+      "version": "1.9.3",
+      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.3.tgz",
+      "integrity": "sha512-QfAUtd+vFdAtFQcC8CCyYt1fYWxSqAiK2cSD6zDB8N3cpsEBAvRxp9zOGg6G/SHHJYAT88/az/IuDGALsNVbGg==",
+      "dev": true,
+      "requires": {
+        "color-name": "1.1.3"
+      }
+    },
+    "color-name": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.3.tgz",
+      "integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=",
+      "dev": true
+    },
+    "dateformat": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/dateformat/-/dateformat-3.0.3.tgz",
+      "integrity": "sha512-jyCETtSl3VMZMWeRo7iY1FL19ges1t55hMo5yaam4Jrsm5EPL89UQkoQRyiI+Yf4k8r2ZpdngkV8hr1lIdjb3Q==",
+      "dev": true
+    },
+    "end-of-stream": {
+      "version": "1.4.4",
+      "resolved": "https://registry.npmjs.org/end-of-stream/-/end-of-stream-1.4.4.tgz",
+      "integrity": "sha512-+uw1inIHVPQoaVuHzRyXd21icM+cnt4CzD5rW+NC1wjOUSTOs+Te7FOv7AhN7vS9x/oIyhLP5PR1H+phQAHu5Q==",
+      "dev": true,
+      "requires": {
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+      }
+    },
+    "escape-string-regexp": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz",
+      "integrity": "sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ=",
+      "dev": true
+    },
+    "fast-redact": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/fast-redact/-/fast-redact-2.0.0.tgz",
+      "integrity": "sha512-zxpkULI9W9MNTK2sJ3BpPQrTEXFNESd2X6O1tXMFpK/XM0G5c5Rll2EVYZH2TqI3xRGK/VaJ+eEOt7pnENJpeA=="
+    },
+    "fast-safe-stringify": {
+      "version": "2.0.7",
+      "resolved": "https://registry.npmjs.org/fast-safe-stringify/-/fast-safe-stringify-2.0.7.tgz",
+      "integrity": "sha512-Utm6CdzT+6xsDk2m8S6uL8VHxNwI6Jub+e9NYTcAms28T84pTa25GJQV9j0CY0N1rM8hK4x6grpF2BQf+2qwVA=="
+    },
+    "flatstr": {
+      "version": "1.0.12",
+      "resolved": "https://registry.npmjs.org/flatstr/-/flatstr-1.0.12.tgz",
+      "integrity": "sha512-4zPxDyhCyiN2wIAtSLI6gc82/EjqZc1onI4Mz/l0pWrAlsSfYH/2ZIcU+e3oA2wDwbzIWNKwa23F8rh6+DRWkw=="
+    },
+    "has-flag": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
+      "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0=",
+      "dev": true
+    },
+    "inherits": {
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
+      "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==",
+      "dev": true
+    },
+    "jmespath": {
+      "version": "0.15.0",
+      "resolved": "https://registry.npmjs.org/jmespath/-/jmespath-0.15.0.tgz",
+      "integrity": "sha1-o/Iiqarp+Wb10nx5ZRDigJF2Qhc=",
+      "dev": true
+    },
+    "joycon": {
+      "version": "2.2.5",
+      "resolved": "https://registry.npmjs.org/joycon/-/joycon-2.2.5.tgz",
+      "integrity": "sha512-YqvUxoOcVPnCp0VU1/56f+iKSdvIRJYPznH22BdXV3xMk75SFXhWeJkZ8C9XxUWt1b5x2X1SxuFygW1U0FmkEQ==",
+      "dev": true
+    },
+    "leven": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/leven/-/leven-2.1.0.tgz",
+      "integrity": "sha1-wuep93IJTe6dNCAq6KzORoeHVYA=",
+      "dev": true
+    },
+    "mri": {
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/mri/-/mri-1.1.4.tgz",
+      "integrity": "sha512-6y7IjGPm8AzlvoUrwAaw1tLnUBudaS3752vcd8JtrpGGQn+rXIe63LFVHm/YMwtqAuh+LJPCFdlLYPWM1nYn6w==",
+      "dev": true
+    },
+    "once": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
+      "integrity": "sha1-WDsap3WWHUsROsF9nFC6753Xa9E=",
+      "dev": true,
+      "requires": {
+        "wrappy": "1"
+      }
+    },
+    "pino": {
+      "version": "5.17.0",
+      "resolved": "https://registry.npmjs.org/pino/-/pino-5.17.0.tgz",
+      "integrity": "sha512-LqrqmRcJz8etUjyV0ddqB6OTUutCgQULPFg2b4dtijRHUsucaAdBgSUW58vY6RFSX+NT8963F+q0tM6lNwGShA==",
+      "requires": {
+        "fast-redact": "^2.0.0",
+        "fast-safe-stringify": "^2.0.7",
+        "flatstr": "^1.0.12",
+        "pino-std-serializers": "^2.4.2",
+        "quick-format-unescaped": "^3.0.3",
+        "sonic-boom": "^0.7.5"
+      }
+    },
+    "pino-pretty": {
+      "version": "3.6.1",
+      "resolved": "https://registry.npmjs.org/pino-pretty/-/pino-pretty-3.6.1.tgz",
+      "integrity": "sha512-S3bal+Yd313OEaPijbf7V+jPxVaTaRO5RQX8S/Mwdtb/8+JOgo1KolDeJTfMDTU2/k6+MHvEbxv+T1ZRfGlnjA==",
+      "dev": true,
+      "requires": {
+        "@hapi/bourne": "^1.3.2",
+        "args": "^5.0.1",
+        "chalk": "^2.4.2",
+        "dateformat": "^3.0.3",
+        "fast-safe-stringify": "^2.0.7",
+        "jmespath": "^0.15.0",
+        "joycon": "^2.2.5",
+        "pump": "^3.0.0",
+        "readable-stream": "^3.4.0",
+        "split2": "^3.1.1",
+        "strip-json-comments": "^3.0.1"
+      }
+    },
+    "pino-std-serializers": {
+      "version": "2.4.2",
+      "resolved": "https://registry.npmjs.org/pino-std-serializers/-/pino-std-serializers-2.4.2.tgz",
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+    },
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+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/pump/-/pump-3.0.0.tgz",
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+      "dev": true,
+      "requires": {
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+        "once": "^1.3.1"
+      }
+    },
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+    },
+    "readable-stream": {
+      "version": "3.6.0",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.0.tgz",
+      "integrity": "sha512-BViHy7LKeTz4oNnkcLJ+lVSL6vpiFeX6/d3oSH8zCW7UxP2onchk+vTGB143xuFjHS3deTgkKoXXymXqymiIdA==",
+      "dev": true,
+      "requires": {
+        "inherits": "^2.0.3",
+        "string_decoder": "^1.1.1",
+        "util-deprecate": "^1.0.1"
+      }
+    },
+    "safe-buffer": {
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.0.tgz",
+      "integrity": "sha512-fZEwUGbVl7kouZs1jCdMLdt95hdIv0ZeHg6L7qPeciMZhZ+/gdesW4wgTARkrFWEpspjEATAzUGPG8N2jJiwbg==",
+      "dev": true
+    },
+    "sonic-boom": {
+      "version": "0.7.6",
+      "resolved": "https://registry.npmjs.org/sonic-boom/-/sonic-boom-0.7.6.tgz",
+      "integrity": "sha512-k9E2QQ4zxuVRLDW+ZW6ISzJs3wlEorVdmM7ApDgor7wsGKSDG5YGHsGmgLY4XYh4DMlr/2ap2BWAE7yTFJtWnQ==",
+      "requires": {
+        "flatstr": "^1.0.12"
+      }
+    },
+    "split2": {
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+      "requires": {
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+      "dev": true,
+      "requires": {
+        "has-flag": "^3.0.0"
+      }
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+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
+      "dev": true
+    },
+    "wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
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+}
diff --git a/04-logs-and-tests/03-pino/03-refactoring/package.json b/04-logs-and-tests/03-pino/03-refactoring/package.json
new file mode 100644
index 0000000..166538a
--- /dev/null
+++ b/04-logs-and-tests/03-pino/03-refactoring/package.json
@@ -0,0 +1,18 @@
+{
+  "name": "sample-chapter-4",
+  "version": "1.0.0",
+  "description": "",
+  "main": "01-hello-pino.js",
+  "scripts": {
+    "start": "node server.js",
+    "debug": "LOG_LEVEL=debug node server.js | ./node_modules/.bin/pino-pretty"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "pino": "5.17.0"
+  },
+  "devDependencies": {
+    "pino-pretty": "3.6.1"
+  }
+}
diff --git a/04-logs-and-tests/03-pino/03-refactoring/routes.js b/04-logs-and-tests/03-pino/03-refactoring/routes.js
new file mode 100644
index 0000000..ef9e27f
--- /dev/null
+++ b/04-logs-and-tests/03-pino/03-refactoring/routes.js
@@ -0,0 +1,23 @@
+'use strict';
+
+const {Router} = require(`express`);
+const router = new Router();
+
+const {getLogger} = require(`./logger`);
+const logger = getLogger();
+
+router.get(`/`, (req, res) => {
+  res.send(`Hello World`);
+
+  // Записываем успех завершения запроса
+  logger.info(`End request with status code ${res.statusCode}`);
+});
+
+
+//  Регистрируем дополнительный маршрут `/about`
+router.get(`/about`, (req, res) => {
+  res.send(`About Node.js lessons`);
+  logger.info(`End request with status code ${res.statusCode}`);
+});
+
+module.exports = router;
diff --git a/04-logs-and-tests/03-pino/03-refactoring/server.js b/04-logs-and-tests/03-pino/03-refactoring/server.js
new file mode 100644
index 0000000..463ad4d
--- /dev/null
+++ b/04-logs-and-tests/03-pino/03-refactoring/server.js
@@ -0,0 +1,34 @@
+'use strict';
+
+const express = require(`express`);
+const router = require(`./routes`);
+const PORT = 3000;
+
+const app = express();
+
+const {getLogger} = require(`./logger`);
+const logger = getLogger();
+
+app.use((req, res, next) => {
+  logger.info(`Start request to url ${req.url}`);
+  next();
+});
+
+app.use(router);
+
+app.use((req, res) => {
+  res.status(404).send(`Page not found`);
+
+  // Записываем, что запрос закончился неудачей
+  logger.error(`End request with error ${res.statusCode}`);
+});
+
+app.listen(PORT, () => {
+
+  // Регистрируем запуск сервера
+  logger.info(`server start on ${PORT}`);
+}).on(`error`, (err) => {
+
+  // Логируем ошибку, если сервер не смог стартовать
+  logger.error(`Server can't start. Error: ${err}`);
+});
diff --git a/04-logs-and-tests/03-pino/package-lock.json b/04-logs-and-tests/03-pino/package-lock.json
new file mode 100644
index 0000000..663970f
--- /dev/null
+++ b/04-logs-and-tests/03-pino/package-lock.json
@@ -0,0 +1,270 @@
+{
+  "name": "sample-chapter-4",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@hapi/bourne": {
+      "version": "1.3.2",
+      "resolved": "https://registry.npmjs.org/@hapi/bourne/-/bourne-1.3.2.tgz",
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+      "dev": true
+    },
+    "ansi-styles": {
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+      "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+      "dev": true,
+      "requires": {
+        "color-convert": "^1.9.0"
+      }
+    },
+    "args": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/args/-/args-5.0.1.tgz",
+      "integrity": "sha512-1kqmFCFsPffavQFGt8OxJdIcETti99kySRUPMpOhaGjL6mRJn8HFU1OxKY5bMqfZKUwTQc1mZkAjmGYaVOHFtQ==",
+      "dev": true,
+      "requires": {
+        "camelcase": "5.0.0",
+        "chalk": "2.4.2",
+        "leven": "2.1.0",
+        "mri": "1.1.4"
+      }
+    },
+    "camelcase": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-5.0.0.tgz",
+      "integrity": "sha512-faqwZqnWxbxn+F1d399ygeamQNy3lPp/H9H6rNrqYh4FSVCtcY+3cub1MxA8o9mDd55mM8Aghuu/kuyYA6VTsA==",
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+      "integrity": "sha1-WDsap3WWHUsROsF9nFC6753Xa9E=",
+      "dev": true,
+      "requires": {
+        "wrappy": "1"
+      }
+    },
+    "pino": {
+      "version": "5.17.0",
+      "resolved": "https://registry.npmjs.org/pino/-/pino-5.17.0.tgz",
+      "integrity": "sha512-LqrqmRcJz8etUjyV0ddqB6OTUutCgQULPFg2b4dtijRHUsucaAdBgSUW58vY6RFSX+NT8963F+q0tM6lNwGShA==",
+      "requires": {
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+        "fast-safe-stringify": "^2.0.7",
+        "flatstr": "^1.0.12",
+        "pino-std-serializers": "^2.4.2",
+        "quick-format-unescaped": "^3.0.3",
+        "sonic-boom": "^0.7.5"
+      }
+    },
+    "pino-pretty": {
+      "version": "3.6.1",
+      "resolved": "https://registry.npmjs.org/pino-pretty/-/pino-pretty-3.6.1.tgz",
+      "integrity": "sha512-S3bal+Yd313OEaPijbf7V+jPxVaTaRO5RQX8S/Mwdtb/8+JOgo1KolDeJTfMDTU2/k6+MHvEbxv+T1ZRfGlnjA==",
+      "dev": true,
+      "requires": {
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+        "args": "^5.0.1",
+        "chalk": "^2.4.2",
+        "dateformat": "^3.0.3",
+        "fast-safe-stringify": "^2.0.7",
+        "jmespath": "^0.15.0",
+        "joycon": "^2.2.5",
+        "pump": "^3.0.0",
+        "readable-stream": "^3.4.0",
+        "split2": "^3.1.1",
+        "strip-json-comments": "^3.0.1"
+      }
+    },
+    "pino-std-serializers": {
+      "version": "2.4.2",
+      "resolved": "https://registry.npmjs.org/pino-std-serializers/-/pino-std-serializers-2.4.2.tgz",
+      "integrity": "sha512-WaL504dO8eGs+vrK+j4BuQQq6GLKeCCcHaMB2ItygzVURcL1CycwNEUHTD/lHFHs/NL5qAz2UKrjYWXKSf4aMQ=="
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+      "dev": true,
+      "requires": {
+        "has-flag": "^3.0.0"
+      }
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+    "util-deprecate": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
+      "dev": true
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+    }
+  }
+}
diff --git a/04-logs-and-tests/03-pino/package.json b/04-logs-and-tests/03-pino/package.json
new file mode 100644
index 0000000..d673880
--- /dev/null
+++ b/04-logs-and-tests/03-pino/package.json
@@ -0,0 +1,17 @@
+{
+  "name": "sample-chapter-4",
+  "version": "1.0.0",
+  "description": "",
+  "main": "01-hello-pino.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "pino": "5.17.0"
+  },
+  "devDependencies": {
+    "pino-pretty": "3.6.1"
+  }
+}
diff --git a/04-logs-and-tests/06-jest/01-multiply.js b/04-logs-and-tests/06-jest/01-multiply.js
new file mode 100644
index 0000000..04256c7
--- /dev/null
+++ b/04-logs-and-tests/06-jest/01-multiply.js
@@ -0,0 +1,4 @@
+'use strict';
+
+const multiply = (a, b) => a * b;
+module.exports = multiply;
diff --git a/04-logs-and-tests/06-jest/01-multiply.test.js b/04-logs-and-tests/06-jest/01-multiply.test.js
new file mode 100644
index 0000000..e6021d3
--- /dev/null
+++ b/04-logs-and-tests/06-jest/01-multiply.test.js
@@ -0,0 +1,7 @@
+'use strict';
+
+const multiply = require(`./01-multiply.js`);
+
+test(`multiply 2 by 2 should be equal 4`, () => {
+  expect(multiply(2, 2)).toBe(4);
+});
diff --git a/04-logs-and-tests/06-jest/package-lock.json b/04-logs-and-tests/06-jest/package-lock.json
new file mode 100644
index 0000000..283a232
--- /dev/null
+++ b/04-logs-and-tests/06-jest/package-lock.json
@@ -0,0 +1,4477 @@
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+      "dev": true,
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diff --git a/04-logs-and-tests/06-jest/package.json b/04-logs-and-tests/06-jest/package.json
new file mode 100644
index 0000000..fd9f07b
--- /dev/null
+++ b/04-logs-and-tests/06-jest/package.json
@@ -0,0 +1,14 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "description": "",
+  "main": "01-multiply.js",
+  "scripts": {
+    "test": "jest"
+  },
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "jest": "25.1.0"
+  }
+}
diff --git a/04-logs-and-tests/07-jest-api/before-all.test.js b/04-logs-and-tests/07-jest-api/before-all.test.js
new file mode 100644
index 0000000..b4d29f8
--- /dev/null
+++ b/04-logs-and-tests/07-jest-api/before-all.test.js
@@ -0,0 +1,29 @@
+'use strict';
+
+beforeAll(() => {
+  // Очистить базу данных и заполнить ее какие-то данными
+  // Jest не начнет выполнение тестов, пока возвращаемый тест не вернет успешный Promise
+  return dataBase.clear().then(() => {
+    return dataBase.insert({
+      things: [`banana`, `apple`, `kivi`],
+      colors: [`red`, `green`, `blue`]
+    });
+  });
+});
+
+afterAll(() => {
+  // После выполнения тестов очистить базу данных
+  dataBase.clear();
+});
+
+test(`can find things`, () => {
+  return dataBase.find(`things`, {}, (results) => {
+    expect(results.length).toBeGreaterThan(0);
+  });
+});
+
+test(`can find colors`, () => {
+  return dataBase.find(`colors`, {}, (results) => {
+    expect(results.length).toBeGreaterThan(0);
+  });
+});
diff --git a/04-logs-and-tests/07-jest-api/multiply-describe.test.js b/04-logs-and-tests/07-jest-api/multiply-describe.test.js
new file mode 100644
index 0000000..3fa661c
--- /dev/null
+++ b/04-logs-and-tests/07-jest-api/multiply-describe.test.js
@@ -0,0 +1,17 @@
+'use strict';
+
+const multiply = require(`./multiply`);
+
+describe(`multiply`, () => {
+  test(`2 by 2 to should be equal 4`, () => {
+    expect(multiply(2, 2)).toBe(4);
+  });
+
+  test(`-2 by 2 to should be equal -4`, () => {
+    expect(multiply(-2, 2)).toBe(-4);
+  });
+});
+
+describe(`other function`, () => {
+  test.todo(`other tests`);
+});
diff --git a/04-logs-and-tests/07-jest-api/multiply-each.test.js b/04-logs-and-tests/07-jest-api/multiply-each.test.js
new file mode 100644
index 0000000..982ec90
--- /dev/null
+++ b/04-logs-and-tests/07-jest-api/multiply-each.test.js
@@ -0,0 +1,11 @@
+'use strict';
+
+const multiply = require(`./multiply`);
+
+test.each([
+  [1, 1, 1],
+  [1, 2, 2],
+  [2, 1, 2],
+])(`multiply %i by %i should be equal %i`, (a, b, expected) => {
+  expect(multiply(a, b)).toBe(expected);
+});
diff --git a/04-logs-and-tests/07-jest-api/multiply-only.test.js b/04-logs-and-tests/07-jest-api/multiply-only.test.js
new file mode 100644
index 0000000..c8fa7f7
--- /dev/null
+++ b/04-logs-and-tests/07-jest-api/multiply-only.test.js
@@ -0,0 +1,11 @@
+'use strict';
+
+const multiply = require(`./multiply`);
+
+test.only(`multiply 2 by 2 to should be equal 4`, () => {
+  expect(multiply(2, 2)).toBe(4);
+});
+
+test(`multiply -2 by 2 to should be equal -4`, () => {
+  expect(multiply(-2, 2)).toBe(-4);
+});
diff --git a/04-logs-and-tests/07-jest-api/multiply-skip.test.js b/04-logs-and-tests/07-jest-api/multiply-skip.test.js
new file mode 100644
index 0000000..d0b6402
--- /dev/null
+++ b/04-logs-and-tests/07-jest-api/multiply-skip.test.js
@@ -0,0 +1,11 @@
+'use strict';
+
+const multiply = require(`./multiply`);
+
+test.skip(`multiply 2 by 2 to should be equal 4`, () => {
+  expect(multiply(2, 2)).toBe(4);
+});
+
+test(`multiply -2 by 2 to should be equal -4`, () => {
+  expect(multiply(-2, 2)).toBe(-4);
+});
diff --git a/04-logs-and-tests/09-supertest/api.http b/04-logs-and-tests/09-supertest/api.http
new file mode 100644
index 0000000..c5ff2ae
--- /dev/null
+++ b/04-logs-and-tests/09-supertest/api.http
@@ -0,0 +1,22 @@
+# Список книг
+GET http://localhost:3000/api/books HTTP/1.1
+
+###
+
+# Просмотр информации о первой книге
+GET http://localhost:3000/api/books/2 HTTP/1.1
+
+###
+
+# Добавление новой книги
+POST http://localhost:3000/api/books HTTP/1.1
+Content-Type: application/json
+
+{
+  "title": "The Dead Zone",
+}
+
+###
+
+# Несуществующий маршрут
+GET http://localhost:3000/bad-route HTTP/1.1
diff --git a/04-logs-and-tests/09-supertest/books-routes.e2e.test.js b/04-logs-and-tests/09-supertest/books-routes.e2e.test.js
new file mode 100644
index 0000000..d65f3e9
--- /dev/null
+++ b/04-logs-and-tests/09-supertest/books-routes.e2e.test.js
@@ -0,0 +1,54 @@
+'use strict';
+
+const request = require(`supertest`);
+const server = require(`./server`);
+
+describe(`Books API end-points`, () => {
+  test(`When get books status code should be 200`, async () => {
+    const res = await request(server).get(`/api/books`);
+    expect(res.statusCode).toBe(200);
+  });
+
+  test(`Should 404 because book does't exists`, async () => {
+    const res = await request(server).get(`/api/books/3000`);
+    expect(res.statusCode).toBe(404);
+  });
+
+  test(`Should had properties id and title`, async () => {
+    const res = await request(server).get(`/api/books/2`);
+    expect(res.body).toHaveProperty(`id`);
+    expect(res.body).toHaveProperty(`title`);
+  });
+
+  test(`Should 404 because end-pont not exits`, async () => {
+    const res = await request(server).get(`/test`);
+    expect(res.statusCode).toBe(404);
+  });
+
+  test(`Should 400 because title property doesn't exists`, async () => {
+    const res = await request(server)
+      .post(`/api/books`)
+      .send({name: `The Outsider`});
+    expect(res.statusCode).toBe(400);
+  });
+
+  test(`Should 200 because sent valid data`, async () => {
+    const res = await request(server)
+      .post(`/api/books`)
+      .send({title: `The Outsider`});
+
+    expect(res.statusCode).toBe(200);
+  });
+
+  test(`Should retrieve book with title 'The Outsider'`, async () => {
+    const res = await request(server)
+      .post(`/api/books`)
+      .send({title: `The Outsider`});
+
+    const id = parseInt(res.body.id, 10);
+    const bookResponse = await request(server)
+      .get(`/api/books/${id}`);
+
+    expect(bookResponse.body.title).toBe(`The Outsider`);
+  });
+});
diff --git a/04-logs-and-tests/09-supertest/books-routes.js b/04-logs-and-tests/09-supertest/books-routes.js
new file mode 100644
index 0000000..eae85f5
--- /dev/null
+++ b/04-logs-and-tests/09-supertest/books-routes.js
@@ -0,0 +1,37 @@
+'use strict';
+
+const {Router} = require(`express`);
+const router = new Router();
+
+const books = [
+  {id: 1, title: `Salem's Lot`},
+  {id: 2, title: `Carrie`},
+  {id: 3, title: `Cujo`},
+];
+
+router.get(`/books`, (req, res) => res.send(books));
+
+router.get(`/books/:id`, (req, res) => {
+  const id = parseInt(req.params.id, 10);
+  const foundBook = books.find((book) => book.id === id);
+
+  if (!foundBook) {
+    return res.status(404).send([]);
+  }
+
+  return res.send(foundBook);
+});
+
+router.post(`/books`, (req, res) => {
+  const {title} = req.body;
+
+  if (!title) {
+    return res.status(400).send({ok: false});
+  }
+
+  const id = books.length + 1;
+  books.push({id, title});
+  return res.send({ok: true, id});
+});
+
+module.exports = router;
diff --git a/04-logs-and-tests/09-supertest/index.js b/04-logs-and-tests/09-supertest/index.js
new file mode 100644
index 0000000..910e334
--- /dev/null
+++ b/04-logs-and-tests/09-supertest/index.js
@@ -0,0 +1,6 @@
+'use strict';
+
+const server = require(`./server`);
+const PORT = 3000;
+
+server.listen(PORT);
diff --git a/04-logs-and-tests/09-supertest/package-lock.json b/04-logs-and-tests/09-supertest/package-lock.json
new file mode 100644
index 0000000..195972d
--- /dev/null
+++ b/04-logs-and-tests/09-supertest/package-lock.json
@@ -0,0 +1,4948 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@babel/code-frame": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.8.3.tgz",
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+      "dev": true,
+      "requires": {
+        "@babel/highlight": "^7.8.3"
+      }
+    },
+    "@babel/core": {
+      "version": "7.8.7",
+      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.8.7.tgz",
+      "integrity": "sha512-rBlqF3Yko9cynC5CCFy6+K/w2N+Sq/ff2BPy+Krp7rHlABIr5epbA7OxVeKoMHB39LZOp1UY5SuLjy6uWi35yA==",
+      "dev": true,
+      "requires": {
+        "@babel/code-frame": "^7.8.3",
+        "@babel/generator": "^7.8.7",
+        "@babel/helpers": "^7.8.4",
+        "@babel/parser": "^7.8.7",
+        "@babel/template": "^7.8.6",
+        "@babel/traverse": "^7.8.6",
+        "@babel/types": "^7.8.7",
+        "convert-source-map": "^1.7.0",
+        "debug": "^4.1.0",
+        "gensync": "^1.0.0-beta.1",
+        "json5": "^2.1.0",
+        "lodash": "^4.17.13",
+        "resolve": "^1.3.2",
+        "semver": "^5.4.1",
+        "source-map": "^0.5.0"
+      },
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+        "source-map": {
+          "version": "0.5.7",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
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+          "dev": true
+        }
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+}
diff --git a/04-logs-and-tests/09-supertest/package.json b/04-logs-and-tests/09-supertest/package.json
new file mode 100644
index 0000000..5b9c6bd
--- /dev/null
+++ b/04-logs-and-tests/09-supertest/package.json
@@ -0,0 +1,19 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "start": "node ./index.js",
+    "test": "jest"
+  },
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "jest": "25.1.0",
+    "supertest": "4.0.2"
+  },
+  "dependencies": {
+    "express": "4.17.1"
+  }
+}
diff --git a/04-logs-and-tests/09-supertest/server.js b/04-logs-and-tests/09-supertest/server.js
new file mode 100644
index 0000000..441c02f
--- /dev/null
+++ b/04-logs-and-tests/09-supertest/server.js
@@ -0,0 +1,12 @@
+'use strict';
+
+const express = require(`express`);
+const apiRoutes = require(`./books-routes`);
+const server = express();
+
+server.use(express.json());
+
+server.use(`/api`, apiRoutes);
+server.use((_req, res) => res.status(404).send({ok: false}));
+
+module.exports = server;
diff --git a/04-logs-and-tests/10-environments/01-hello-env.js b/04-logs-and-tests/10-environments/01-hello-env.js
new file mode 100644
index 0000000..bff2b28
--- /dev/null
+++ b/04-logs-and-tests/10-environments/01-hello-env.js
@@ -0,0 +1,3 @@
+'use strict';
+
+console.log(`Your port is ${process.env.PORT}`);
diff --git a/04-logs-and-tests/10-environments/02-some-vars.js b/04-logs-and-tests/10-environments/02-some-vars.js
new file mode 100644
index 0000000..15c83e9
--- /dev/null
+++ b/04-logs-and-tests/10-environments/02-some-vars.js
@@ -0,0 +1,5 @@
+'use strict';
+
+// Приложение выводит значения переменных PORT и MY_VAR
+console.log(`Your port is ${process.env.PORT}`);
+console.log(`MY_VAR === ${process.env.MY_VAR}`);
diff --git a/04-logs-and-tests/10-environments/03-node-env.js b/04-logs-and-tests/10-environments/03-node-env.js
new file mode 100644
index 0000000..8bfe9ea
--- /dev/null
+++ b/04-logs-and-tests/10-environments/03-node-env.js
@@ -0,0 +1,3 @@
+'use strict';
+
+console.log(`Application run in mode: ${process.env.NODE_ENV}`);
diff --git a/04-logs-and-tests/10-environments/package-lock.json b/04-logs-and-tests/10-environments/package-lock.json
new file mode 100644
index 0000000..264d5eb
--- /dev/null
+++ b/04-logs-and-tests/10-environments/package-lock.json
@@ -0,0 +1,57 @@
+{
+  "name": "03-node-env",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "cross-env": {
+      "version": "7.0.2",
+      "resolved": "https://registry.npmjs.org/cross-env/-/cross-env-7.0.2.tgz",
+      "integrity": "sha512-KZP/bMEOJEDCkDQAyRhu3RL2ZO/SUVrxQVI0G3YEQ+OLbRA3c6zgixe8Mq8a/z7+HKlNEjo8oiLUs8iRijY2Rw==",
+      "requires": {
+        "cross-spawn": "^7.0.1"
+      }
+    },
+    "cross-spawn": {
+      "version": "7.0.1",
+      "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.1.tgz",
+      "integrity": "sha512-u7v4o84SwFpD32Z8IIcPZ6z1/ie24O6RU3RbtL5Y316l3KuHVPx9ItBgWQ6VlfAFnRnTtMUrsQ9MUUTuEZjogg==",
+      "requires": {
+        "path-key": "^3.1.0",
+        "shebang-command": "^2.0.0",
+        "which": "^2.0.1"
+      }
+    },
+    "isexe": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/isexe/-/isexe-2.0.0.tgz",
+      "integrity": "sha1-6PvzdNxVb/iUehDcsFctYz8s+hA="
+    },
+    "path-key": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/path-key/-/path-key-3.1.1.tgz",
+      "integrity": "sha512-ojmeN0qd+y0jszEtoY48r0Peq5dwMEkIlCOu6Q5f41lfkswXuKtYrhgoTpLnyIcHm24Uhqx+5Tqm2InSwLhE6Q=="
+    },
+    "shebang-command": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-2.0.0.tgz",
+      "integrity": "sha512-kHxr2zZpYtdmrN1qDjrrX/Z1rR1kG8Dx+gkpK1G4eXmvXswmcE1hTWBWYUzlraYw1/yZp6YuDY77YtvbN0dmDA==",
+      "requires": {
+        "shebang-regex": "^3.0.0"
+      }
+    },
+    "shebang-regex": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/shebang-regex/-/shebang-regex-3.0.0.tgz",
+      "integrity": "sha512-7++dFhtcx3353uBaq8DDR4NuxBetBzC7ZQOhmTQInHEd6bSrXdiEyzCvG07Z44UYdLShWUyXt5M/yhz8ekcb1A=="
+    },
+    "which": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
+      "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==",
+      "requires": {
+        "isexe": "^2.0.0"
+      }
+    }
+  }
+}
diff --git a/04-logs-and-tests/10-environments/package.json b/04-logs-and-tests/10-environments/package.json
new file mode 100644
index 0000000..c8e9e9c
--- /dev/null
+++ b/04-logs-and-tests/10-environments/package.json
@@ -0,0 +1,15 @@
+{
+  "name": "03-node-env",
+  "version": "1.0.0",
+  "description": "",
+  "main": "01-hello-env.js",
+  "scripts": {
+    "start::dev": "cross-env NODE_ENV=development node 03-node-env.js",
+    "start": "cross-env NODE_ENV=production node 03-node-env.js"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "cross-env": "7.0.2"
+  }
+}
diff --git a/04-logs-and-tests/11-env-in-action/01-hello-env.js b/04-logs-and-tests/11-env-in-action/01-hello-env.js
new file mode 100644
index 0000000..1db017d
--- /dev/null
+++ b/04-logs-and-tests/11-env-in-action/01-hello-env.js
@@ -0,0 +1,6 @@
+'use strict';
+
+require(`dotenv`).config();
+
+console.log(process.env.NODE_ENV); // development
+console.log(process.env.PORT); // 8626
diff --git a/04-logs-and-tests/11-env-in-action/02-hello-env.js b/04-logs-and-tests/11-env-in-action/02-hello-env.js
new file mode 100644
index 0000000..9dc781b
--- /dev/null
+++ b/04-logs-and-tests/11-env-in-action/02-hello-env.js
@@ -0,0 +1,4 @@
+'use strict';
+
+console.log(process.env.NODE_ENV); // development
+console.log(process.env.PORT); // 8626
diff --git a/04-logs-and-tests/11-env-in-action/03-config.js b/04-logs-and-tests/11-env-in-action/03-config.js
new file mode 100644
index 0000000..1dcd544
--- /dev/null
+++ b/04-logs-and-tests/11-env-in-action/03-config.js
@@ -0,0 +1,9 @@
+'use strict';
+
+require(`dotenv`).config();
+
+module.exports = {
+  PORT: process.env.PORT,
+  NODE_ENV: process.env.NODE_ENV,
+};
+
diff --git a/04-logs-and-tests/11-env-in-action/03-read-config.js b/04-logs-and-tests/11-env-in-action/03-read-config.js
new file mode 100644
index 0000000..0132f19
--- /dev/null
+++ b/04-logs-and-tests/11-env-in-action/03-read-config.js
@@ -0,0 +1,5 @@
+'use strict';
+
+const {PORT, NODE_ENV} = require(`./03-config`);
+console.log(PORT);
+console.log(NODE_ENV);
diff --git a/04-logs-and-tests/11-env-in-action/04-config.js b/04-logs-and-tests/11-env-in-action/04-config.js
new file mode 100644
index 0000000..9e173ce
--- /dev/null
+++ b/04-logs-and-tests/11-env-in-action/04-config.js
@@ -0,0 +1,10 @@
+'use strict';
+
+const dotenv = require(`dotenv`);
+const result = dotenv.config();
+
+if (result.error) {
+  throw result.error;
+}
+
+module.exports = Object.assign({}, result.parsed);
diff --git a/04-logs-and-tests/11-env-in-action/04-read-config.js b/04-logs-and-tests/11-env-in-action/04-read-config.js
new file mode 100644
index 0000000..858c97f
--- /dev/null
+++ b/04-logs-and-tests/11-env-in-action/04-read-config.js
@@ -0,0 +1,5 @@
+'use strict';
+
+const {PORT, NODE_ENV} = require(`./04-config`);
+console.log(PORT);
+console.log(NODE_ENV);
diff --git a/04-logs-and-tests/11-env-in-action/package-lock.json b/04-logs-and-tests/11-env-in-action/package-lock.json
new file mode 100644
index 0000000..14747a0
--- /dev/null
+++ b/04-logs-and-tests/11-env-in-action/package-lock.json
@@ -0,0 +1,13 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "dotenv": {
+      "version": "8.2.0",
+      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-8.2.0.tgz",
+      "integrity": "sha512-8sJ78ElpbDJBHNeBzUbUVLsqKdccaa/BXF1uPTw3GrvQTBgrQrtObr2mUrE38vzYd8cEv+m/JBfDLioYcfXoaw=="
+    }
+  }
+}
diff --git a/04-logs-and-tests/11-env-in-action/package.json b/04-logs-and-tests/11-env-in-action/package.json
new file mode 100644
index 0000000..bd226a8
--- /dev/null
+++ b/04-logs-and-tests/11-env-in-action/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node -r dotenv/config 02-hello-env.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "dotenv": "8.2.0"
+  }
+}
diff --git a/04-logs-and-tests/12-debug/01-hello-debug.js b/04-logs-and-tests/12-debug/01-hello-debug.js
new file mode 100644
index 0000000..a4484b6
--- /dev/null
+++ b/04-logs-and-tests/12-debug/01-hello-debug.js
@@ -0,0 +1,14 @@
+'use strict';
+
+const debug = require(`debug`)(`server`);
+const http = require(`http`);
+const PORT = 3000;
+
+const server = http.createServer((req, res) => {
+  debug(`${req.method} ${req.url}`);
+  res.end(`hello world\n`);
+});
+
+server.listen(PORT, () => {
+  debug(`server is running on ${PORT}`);
+});
diff --git a/04-logs-and-tests/12-debug/02-file-reader.js b/04-logs-and-tests/12-debug/02-file-reader.js
new file mode 100644
index 0000000..2789e4f
--- /dev/null
+++ b/04-logs-and-tests/12-debug/02-file-reader.js
@@ -0,0 +1,32 @@
+'use strict';
+
+const debug = require(`debug`)(`file-reader`);
+const fs = require(`fs`);
+const {promisify} = require(`util`);
+
+const readFile = promisify(fs.readFile);
+const formatError = (error) => (error && error.message) || ``;
+
+const read = (name) => {
+
+  // фиксируем старт чтения из файла
+  debug(`reading is started`, name);
+  return readFile(name)
+      .then((content) => {
+
+        // фиксируем завершение чтения файла
+        debug(`reading is finished`, name);
+        return content;
+      })
+      .catch((error) => {
+        const formatedError = formatError(error);
+
+        // фиксируем ошибку во время чтения
+        debug(`error is occured during the reading`, formatedError);
+        return formatedError;
+      });
+};
+
+module.exports = {
+  read
+};
diff --git a/04-logs-and-tests/12-debug/02-server.js b/04-logs-and-tests/12-debug/02-server.js
new file mode 100644
index 0000000..4aa8115
--- /dev/null
+++ b/04-logs-and-tests/12-debug/02-server.js
@@ -0,0 +1,18 @@
+'use strict';
+
+const debug = require(`debug`)(`server`);
+const http = require(`http`);
+const fileReader = require(`./02-file-reader`);
+
+const PORT = 3000;
+const FILE_NAME = `test.txt`;
+
+const server = http.createServer((req, res) => {
+  debug(`${req.method} ${req.url}`);
+  fileReader.read(FILE_NAME)
+      .then((content) => res.end(content));
+});
+
+server.listen(PORT, () => {
+  debug(`server is running on ${PORT}`);
+});
diff --git a/04-logs-and-tests/12-debug/03-express-and-debug.js b/04-logs-and-tests/12-debug/03-express-and-debug.js
new file mode 100644
index 0000000..f20d717
--- /dev/null
+++ b/04-logs-and-tests/12-debug/03-express-and-debug.js
@@ -0,0 +1,12 @@
+'use strict';
+
+const express = require(`express`);
+const app = express();
+
+const PORT = 3000;
+
+app.get(`/`, function (req, res) {
+  res.send(`Hello World!`);
+});
+
+app.listen(PORT);
diff --git a/04-logs-and-tests/12-debug/package-lock.json b/04-logs-and-tests/12-debug/package-lock.json
new file mode 100644
index 0000000..d346e02
--- /dev/null
+++ b/04-logs-and-tests/12-debug/package-lock.json
@@ -0,0 +1,225 @@
+{
+  "name": "debug-examples",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "ansi-styles": {
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+      "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+      "requires": {
+        "color-convert": "^1.9.0"
+      }
+    },
+    "chalk": {
+      "version": "2.4.2",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
+      "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
+      "requires": {
+        "ansi-styles": "^3.2.1",
+        "escape-string-regexp": "^1.0.5",
+        "supports-color": "^5.3.0"
+      }
+    },
+    "color-convert": {
+      "version": "1.9.3",
+      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.3.tgz",
+      "integrity": "sha512-QfAUtd+vFdAtFQcC8CCyYt1fYWxSqAiK2cSD6zDB8N3cpsEBAvRxp9zOGg6G/SHHJYAT88/az/IuDGALsNVbGg==",
+      "requires": {
+        "color-name": "1.1.3"
+      }
+    },
+    "color-name": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.3.tgz",
+      "integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU="
+    },
+    "core-util-is": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
+      "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac="
+    },
+    "debug": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
+      "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
+      "requires": {
+        "ms": "^2.1.1"
+      }
+    },
+    "end-of-stream": {
+      "version": "1.4.4",
+      "resolved": "https://registry.npmjs.org/end-of-stream/-/end-of-stream-1.4.4.tgz",
+      "integrity": "sha512-+uw1inIHVPQoaVuHzRyXd21icM+cnt4CzD5rW+NC1wjOUSTOs+Te7FOv7AhN7vS9x/oIyhLP5PR1H+phQAHu5Q==",
+      "requires": {
+        "once": "^1.4.0"
+      }
+    },
+    "escape-string-regexp": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz",
+      "integrity": "sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ="
+    },
+    "fast-json-parse": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/fast-json-parse/-/fast-json-parse-1.0.3.tgz",
+      "integrity": "sha512-FRWsaZRWEJ1ESVNbDWmsAlqDk96gPQezzLghafp5J4GUKjbCz3OkAHuZs5TuPEtkbVQERysLp9xv6c24fBm8Aw=="
+    },
+    "fast-safe-stringify": {
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/fast-safe-stringify/-/fast-safe-stringify-1.2.3.tgz",
+      "integrity": "sha512-QJYT/i0QYoiZBQ71ivxdyTqkwKkQ0oxACXHYxH2zYHJEgzi2LsbjgvtzTbLi1SZcF190Db2YP7I7eTsU2egOlw=="
+    },
+    "flatstr": {
+      "version": "1.0.12",
+      "resolved": "https://registry.npmjs.org/flatstr/-/flatstr-1.0.12.tgz",
+      "integrity": "sha512-4zPxDyhCyiN2wIAtSLI6gc82/EjqZc1onI4Mz/l0pWrAlsSfYH/2ZIcU+e3oA2wDwbzIWNKwa23F8rh6+DRWkw=="
+    },
+    "has-flag": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
+      "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0="
+    },
+    "inherits": {
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
+      "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ=="
+    },
+    "isarray": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
+      "integrity": "sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE="
+    },
+    "ms": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+      "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w=="
+    },
+    "once": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
+      "integrity": "sha1-WDsap3WWHUsROsF9nFC6753Xa9E=",
+      "requires": {
+        "wrappy": "1"
+      }
+    },
+    "pino": {
+      "version": "4.17.6",
+      "resolved": "https://registry.npmjs.org/pino/-/pino-4.17.6.tgz",
+      "integrity": "sha512-LFDwmhyWLBnmwO/2UFbWu1jEGVDzaPupaVdx0XcZ3tIAx1EDEBauzxXf2S0UcFK7oe+X9MApjH0hx9U1XMgfCA==",
+      "requires": {
+        "chalk": "^2.4.1",
+        "fast-json-parse": "^1.0.3",
+        "fast-safe-stringify": "^1.2.3",
+        "flatstr": "^1.0.5",
+        "pino-std-serializers": "^2.0.0",
+        "pump": "^3.0.0",
+        "quick-format-unescaped": "^1.1.2",
+        "split2": "^2.2.0"
+      }
+    },
+    "pino-debug": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/pino-debug/-/pino-debug-1.3.0.tgz",
+      "integrity": "sha512-vmzrp1AXi5zTWlG7DSa0olmBhs4FbxwhI4DttKmaA1pPWbt2VB/EYvJ+mOsJQE5Cmi3qd9obYaX3ZmhwZ2N6bA==",
+      "requires": {
+        "pino": "^4.0.2"
+      }
+    },
+    "pino-std-serializers": {
+      "version": "2.4.2",
+      "resolved": "https://registry.npmjs.org/pino-std-serializers/-/pino-std-serializers-2.4.2.tgz",
+      "integrity": "sha512-WaL504dO8eGs+vrK+j4BuQQq6GLKeCCcHaMB2ItygzVURcL1CycwNEUHTD/lHFHs/NL5qAz2UKrjYWXKSf4aMQ=="
+    },
+    "process-nextick-args": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.1.tgz",
+      "integrity": "sha512-3ouUOpQhtgrbOa17J7+uxOTpITYWaGP7/AhoR3+A+/1e9skrzelGi/dXzEYyvbxubEF6Wn2ypscTKiKJFFn1ag=="
+    },
+    "pump": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/pump/-/pump-3.0.0.tgz",
+      "integrity": "sha512-LwZy+p3SFs1Pytd/jYct4wpv49HiYCqd9Rlc5ZVdk0V+8Yzv6jR5Blk3TRmPL1ft69TxP0IMZGJ+WPFU2BFhww==",
+      "requires": {
+        "end-of-stream": "^1.1.0",
+        "once": "^1.3.1"
+      }
+    },
+    "quick-format-unescaped": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/quick-format-unescaped/-/quick-format-unescaped-1.1.2.tgz",
+      "integrity": "sha1-DKWB3jF0vs7yWsPC6JVjQjgdtpg=",
+      "requires": {
+        "fast-safe-stringify": "^1.0.8"
+      }
+    },
+    "readable-stream": {
+      "version": "2.3.7",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.7.tgz",
+      "integrity": "sha512-Ebho8K4jIbHAxnuxi7o42OrZgF/ZTNcsZj6nRKyUmkhLFq8CHItp/fy6hQZuZmP/n3yZ9VBUbp4zz/mX8hmYPw==",
+      "requires": {
+        "core-util-is": "~1.0.0",
+        "inherits": "~2.0.3",
+        "isarray": "~1.0.0",
+        "process-nextick-args": "~2.0.0",
+        "safe-buffer": "~5.1.1",
+        "string_decoder": "~1.1.1",
+        "util-deprecate": "~1.0.1"
+      }
+    },
+    "safe-buffer": {
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
+      "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
+    },
+    "split2": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/split2/-/split2-2.2.0.tgz",
+      "integrity": "sha512-RAb22TG39LhI31MbreBgIuKiIKhVsawfTgEGqKHTK87aG+ul/PB8Sqoi3I7kVdRWiCfrKxK3uo4/YUkpNvhPbw==",
+      "requires": {
+        "through2": "^2.0.2"
+      }
+    },
+    "string_decoder": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+      "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
+      "requires": {
+        "safe-buffer": "~5.1.0"
+      }
+    },
+    "supports-color": {
+      "version": "5.5.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+      "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+      "requires": {
+        "has-flag": "^3.0.0"
+      }
+    },
+    "through2": {
+      "version": "2.0.5",
+      "resolved": "https://registry.npmjs.org/through2/-/through2-2.0.5.tgz",
+      "integrity": "sha512-/mrRod8xqpA+IHSLyGCQ2s8SPHiCDEeQJSep1jqLYeEUClOFG2Qsh+4FU6G9VeqpZnGW/Su8LQGc4YKni5rYSQ==",
+      "requires": {
+        "readable-stream": "~2.3.6",
+        "xtend": "~4.0.1"
+      }
+    },
+    "util-deprecate": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
+    },
+    "wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
+    },
+    "xtend": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
+      "integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ=="
+    }
+  }
+}
diff --git a/04-logs-and-tests/12-debug/package.json b/04-logs-and-tests/12-debug/package.json
new file mode 100644
index 0000000..b27bd14
--- /dev/null
+++ b/04-logs-and-tests/12-debug/package.json
@@ -0,0 +1,15 @@
+{
+  "name": "debug-examples",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "debug": "4.1.1",
+    "pino-debug": "1.3.0"
+  }
+}
diff --git a/05-databases/create-db.sql b/05-databases/create-db.sql
new file mode 100644
index 0000000..cd6a308
--- /dev/null
+++ b/05-databases/create-db.sql
@@ -0,0 +1,9 @@
+CREATE DATABASE big_library
+    WITH
+    OWNER = postgres
+    ENCODING = 'UTF8'
+    LC_COLLATE = 'C'
+    LC_CTYPE = 'C'
+    TABLESPACE = pg_default
+		TEMPLATE template0
+    CONNECTION LIMIT = -1;
diff --git a/05-databases/fill-data.sql b/05-databases/fill-data.sql
new file mode 100644
index 0000000..d94b744
--- /dev/null
+++ b/05-databases/fill-data.sql
@@ -0,0 +1,231 @@
+/* countries */
+INSERT INTO countries VALUES
+(1, 'Великобритания'),
+(2, 'Нидерланды'),
+(3, 'Канада'),
+(4, 'Франция'),
+(5, 'Испания'),
+(6, 'США'),
+(7, 'Германия'),
+(8, 'Россия');
+
+/* authors */
+INSERT INTO authors VALUES
+(1, 'Стивен', 'Кинг', '1947-09-21', 6),
+(2, 'Сергей', 'Лукьяненко', '1968-04-11', 8),
+(3, 'Джон', 'Резиг', '1984-05-08', 6),
+(4, 'Артур Конан', 'Дойл', '1859-05-22', 1),
+(5, 'Говард Филлипс', 'Лавкрафт', '1890-08-20', 6),
+(6, 'Антон', 'Чехов', '1860-01-29', 8),
+(7, 'Джанет', 'Азимов', '1926-08-06', 6),
+(8, 'Айзек', 'Азимов', '1919-10-04', 8),
+(9, 'Курт', 'Занднер', '1910-08-05', 7),
+(10, 'Питер', 'Уоттс', '1958-01-25', 3),
+(11, 'Роберт', 'Сойер', '1960-04-29', 3),
+(12, 'Мишель', 'Верн', '1861-08-04', 4);
+
+/* genres */
+INSERT INTO genres VALUES
+(1, 'Фантастика'),
+(2, 'Ужасы'),
+(3, 'Драма'),
+(4, 'Трагедия'),
+(5, 'Комедия'),
+(6, 'Роман'),
+(7, 'IT');
+
+/* publishers */
+INSERT INTO publishers VALUES
+(1, 'Pearson', 1),
+(2, 'Reed Elsevier', 2),
+(3, 'ThomsonReuters', 3),
+(4, 'Wolters Kluwer', 2),
+(5, 'Hachette Livre', 4),
+(6, 'Grupo Planeta', 5),
+(7, 'McGraw–Hill Education', 6),
+(8, 'Random House', 7),
+(9, 'Holtzbrinck', 7),
+(10, 'Scholastic', 6),
+(11, 'АСТ', 8),
+(12, 'Питер', 8);
+
+/* books */
+INSERT INTO books VALUES
+(1, 'Оно', '1986-01-01', 1138, 1, 6),
+(2, 'Кладбище домашних животных', '1983-11-13', 373, 1, 6),
+(3, 'Под куполом', '2009-01-01', 1106, 1, 6),
+(4, '11/22/63', '2011-11-08', 566, 1, 6),
+(5, 'Зелёная миля', '1996-01-01', 496, 1, 6),
+(6, 'Доктор сон', '2013-01-01', 531, 1, 6),
+(7, 'Чужак', '2018-01-01', 590, 1, 6),
+(8, 'Институт', '2019-09-01', 600, 1, 6),
+(9, 'Ночной дозор', '1998-01-01', 400, 2, NULL),
+(10, 'Дневной дозор', '2000-01-01', 456, 2, 8),
+(11, 'Сумеречный дозор', '2003-01-01', 550, 2, 8),
+(12, 'Последний дозор', '2005-01-01', 338, 2, 8),
+(13, 'Лабиринт отражений', '1997-01-01', 334, 2, 8),
+(14, 'Черновик', '2005-01-01', 600, 2, 8),
+(15, 'Чистовик', '2007-01-01', 550, 2, 8),
+(16, 'JavaScript. Профессиональные приемы программирования', '2008-01-01', 384, 3, 6),
+(17, 'Этюд в багровых тонах', '1887-01-01', 300, 4, 1),
+(18, 'Знак четырёх', '1890-01-01', 800, 4, 1),
+(19, 'Долина ужаса', '1915-01-01', 612, 4, 1),
+(20, 'Страна тумана', '1926-01-01', 500, 4, 7),
+(21, 'Склеп', '1922-03-01', 344, 5, 6),
+(22, 'Заброшенный дом', '1924-10-01', 400, 5, 6),
+(23, 'Зов Ктулху', '1926-06-01', 400, 5, 6),
+(24, 'В вагоне', '1881-01-01', 85, 6, 8),
+(25, 'Толстый и тонкий', '1883-01-01', 8, 6, 8),
+(26, 'Орден', '1883-01-01', 15, 6, 8),
+(27, 'Ложная слепота', '2006-01-01', 755, 10, 3),
+(28, 'Эхопраксия', '2014-01-01', 480, 10, 3),
+(29, 'Я робот', '1950-01-01', 253, 8, 6),
+(30, 'Конец Вечности', '1955-01-01', 199, 8, 6),
+(31, 'Nacht ohne Gnade', '1958-01-01', 777, 9, 7),
+(32, 'Signal aus dem Weltall', '1960-01-01', 666, 9, 7),
+(33, 'Курьерский поезд будущего', '1888-01-01', 426, 12, 4),
+(34, 'Смертельный эксперимент', '1995-01-01', 566, 11, 3),
+(35, 'Norby and the Lost Princess', '1985-01-01', 664, 7, 6);
+
+/* books_genres */
+INSERT INTO books_genres VALUES
+(1, 2),
+(1, 6),
+(2, 2),
+(3, 1),
+(3, 6),
+(4, 1),
+(4, 6),
+(5, 3),
+(6, 2),
+(6, 3),
+(7, 2),
+(8, 1),
+(8, 3),
+(8, 6),
+(9, 1),
+(10, 1),
+(11, 1),
+(12, 1),
+(13, 1),
+(14, 1),
+(15, 1),
+(15, 2),
+(16, 7),
+(17, 3),
+(18, 3),
+(19, 2),
+(20, 2),
+(21, 2),
+(22, 2),
+(23, 2),
+(23, 3),
+(24, 4),
+(25, 4),
+(25, 5),
+(26, 3),
+(27, 1),
+(28, 1),
+(29, 1),
+(30, 1),
+(31, 1),
+(32, 1),
+(33, 1),
+(34, 1),
+(34, 6),
+(35, 1);
+
+/* books_publishers */
+INSERT INTO books_publishers VALUES
+(1,  1),
+(1,  2),
+(1, 11),
+(2, 1),
+(2, 11),
+(2, 5),
+(3, 11),
+(3, 1),
+(4, 1),
+(4, 11),
+(5, 1),
+(5, 9),
+(5, 11),
+(6, 1),
+(6, 11),
+(6, 8),
+(7, 1),
+(7, 2),
+(7, 11),
+(7, 7),
+(8, 1),
+(8, 11),
+(9, 11),
+(10, 11),
+(13, 11),
+(14, 11),
+(15, 11),
+(16, 12),
+(17, 11),
+(18, 11),
+(19, 11),
+(20, 11),
+(21, 11),
+(22, 11),
+(22, 7),
+(23, 11),
+(24, 11),
+(25, 11),
+(26, 11),
+(27, 1),
+(27, 2),
+(27, 11),
+(28, 1),
+(28, 8),
+(28, 5),
+(29, 1),
+(29, 11),
+(30, 11),
+(30, 1),
+(30, 2),
+(30, 3),
+(30, 4),
+(31, 4),
+(32, 5),
+(33, 11),
+(34, 3),
+(34, 1),
+(35, 1);
+
+/* readers */
+INSERT INTO readers VALUES
+(1, 'Иван', 'Иванов', '1985-01-29'),
+(2, 'Андрей', 'Петров', '1990-03-12'),
+(3, 'Антон', 'Верный', '1983-04-08'),
+(4, 'Владимир', 'Андропов', '1979-05-03'),
+(5, 'Константин', 'Сидоров', '1989-03-14'),
+(6, 'Эдуард', 'Чтецов', '1982-02-14');
+
+/* books_readers */
+INSERT INTO books_readers VALUES
+(1, 1),
+(2, 1),
+(3, 1),
+(1, 2),
+(34, 2),
+(1, 3),
+(29, 1),
+(2, 3),
+(3, 3),
+(4, 3),
+(5, 3),
+(6, 3),
+(7, 3),
+(8, 3),
+(15, 3),
+(16, 4),
+(16, 5),
+(17, 5),
+(18, 5),
+(19, 5),
+(20, 5),
+(21, 5);
diff --git a/05-databases/queries.sql b/05-databases/queries.sql
new file mode 100644
index 0000000..56ff629
--- /dev/null
+++ b/05-databases/queries.sql
@@ -0,0 +1,91 @@
+/* Количество книг */
+SELECT COUNT(*)
+FROM books;
+
+/* Упорядочить результат */
+SELECT
+ authors.lastname,
+ count(authors.lastname)
+FROM authors
+GROUP BY authors.lastname
+ORDER BY count(authors.lastname) DESC;
+
+/* Пример с HAVING */
+SELECT
+ authors.lastname,
+ count(authors.lastname)
+FROM authors
+GROUP BY
+	authors.lastname
+HAVING count(authors.lastname) > 1
+ORDER BY count(authors.lastname) DESC;
+
+/* Информация о книгах */
+SELECT
+	authors.firstname AS "Имя",
+	authors.lastname AS "Фамилия",
+	books.title AS "Название",
+	books.release_date AS "Год выхода",
+	books.page_count AS "Страниц",
+	countries.title AS "Страна"
+FROM books
+INNER JOIN authors
+	ON books.author_id = authors.id;
+
+/* Информация о книга + страна */
+SELECT
+	authors.firstname AS "Имя",
+	authors.lastname AS "Фамилия",
+	books.title AS "Название",
+	books.release_date AS "Год выхода",
+	books.page_count AS "Страниц",
+	countries.title AS "Страна"
+FROM books
+INNER JOIN authors
+	ON books.author_id = authors.id
+LEFT JOIN countries
+	ON books.country_id = countries.id;
+
+/* Авторы и количество книг */
+SELECT
+	authors.firstname AS "Имя",
+	authors.lastname AS "Фамилия",
+	COUNT(books.id) AS "Кол-во книг"
+FROM
+	authors
+	INNER JOIN books
+		ON authors.id = books.author_id
+GROUP BY
+	authors.firstname,
+	authors.lastname;
+
+/* Автор + количество книг + упорядочивание */
+SELECT
+	authors.firstname AS "Имя",
+	authors.lastname AS "Фамилия",
+	COUNT(books.id) AS "Кол-во книг"
+FROM
+	authors
+	INNER JOIN books
+		ON authors.id = books.author_id
+GROUP BY
+	authors.firstname,
+	authors.lastname
+ORDER BY
+	COUNT(books.id) DESC;
+
+/* Функции для работы со строками */
+SELECT
+	concat(authors.firstname, ' ', authors.lastname) AS "Автор",
+	concat(authors.lastname, ' ', left(authors.firstname, 1)) AS "Автор2",
+  md5(authors.lastname) AS "hash"
+FROM authors
+
+/* Форматирование года */
+SELECT
+	concat(authors.firstname, ' ', authors.lastname) AS "Автор",
+	to_char(authors.birth_data, 'YYYY') "Год рождения"
+FROM authors
+
+
+
diff --git a/05-databases/schema.sql b/05-databases/schema.sql
new file mode 100644
index 0000000..72f3ee6
--- /dev/null
+++ b/05-databases/schema.sql
@@ -0,0 +1,110 @@
+DROP TABLE IF EXISTS books_readers;
+DROP TABLE IF EXISTS books_publishers;
+DROP TABLE IF EXISTS books_genres;
+DROP TABLE IF EXISTS books;
+DROP TABLE IF EXISTS readers;
+DROP TABLE IF EXISTS genres;
+DROP TABLE IF EXISTS publishers;
+DROP TABLE IF EXISTS authors;
+DROP TABLE IF EXISTS countries;
+
+CREATE TABLE countries
+(
+	id SERIAL PRIMARY KEY,
+  title VARCHAR (50) NOT NULL
+);
+
+
+CREATE TABLE authors (
+	id SERIAL PRIMARY KEY,
+	firstname VARCHAR(50) NOT NULL,
+	lastname VARCHAR(50) NOT NULL,
+	birth_date DATE,
+	country_id INTEGER,
+	FOREIGN KEY (country_id) REFERENCES countries (id)
+		ON DELETE SET NULL
+		ON UPDATE SET NULL
+);
+
+
+CREATE TABLE publishers
+(
+	id SERIAL PRIMARY KEY,
+	title VARCHAR(50) NOT NULL,
+	country_id INTEGER,
+	FOREIGN KEY (country_id) REFERENCES countries (id)
+		ON UPDATE CASCADE
+		ON DELETE SET NULL
+);
+
+
+CREATE TABLE genres
+(
+	id SERIAL PRIMARY KEY,
+	title VARCHAR(30) NOT NULL
+);
+
+
+CREATE TABLE readers
+(
+	id SERIAL PRIMARY KEY,
+	firstname VARCHAR(50) NOT NULL,
+	lastname VARCHAR(50) NOT NULL,
+	birth_date DATE
+);
+
+CREATE TABLE books
+(
+	id SERIAL PRIMARY KEY,
+	title VARCHAR(100) NOT NULL,
+	release_date DATE NOT NULL,
+	page_count INTEGER NOT NULL DEFAULT 0,
+	author_id INTEGER NOT NULL,
+	country_id INTEGER,
+	FOREIGN KEY (author_id) REFERENCES authors (id)
+		ON DELETE CASCADE
+		ON UPDATE CASCADE,
+	FOREIGN KEY (country_id) REFERENCES countries(id)
+		ON DELETE SET NULL
+		ON UPDATE SET NULL
+);
+
+
+CREATE TABLE books_genres
+(
+	book_id INTEGER NOT NULL,
+	genre_id INTEGER NOT NULL,
+	CONSTRAINT books_genres_pk PRIMARY KEY (book_id, genre_id),
+  FOREIGN KEY (book_id) REFERENCES books (id)
+		ON DELETE CASCADE
+		ON UPDATE CASCADE,
+	FOREIGN KEY (genre_id) REFERENCES genres (id)
+		ON DELETE CASCADE
+		ON UPDATE CASCADE
+);
+
+CREATE TABLE books_publishers
+(
+	book_id INTEGER NOT NULL,
+	publisher_id INTEGER NOT NULL,
+	CONSTRAINT book_publishers_pk PRIMARY KEY (book_id, publisher_id),
+	FOREIGN KEY (book_id) REFERENCES books (id)
+		ON DELETE CASCADE
+		ON UPDATE CASCADE,
+	FOREIGN KEY (publisher_id) REFERENCES publishers (id)
+		ON DELETE CASCADE
+		ON UPDATE CASCADE
+);
+
+CREATE TABLE books_readers
+(
+	book_id INTEGER NOT NULL,
+	reader_id INTEGER NOT NULL,
+	CONSTRAINT books_readers_pk PRIMARY KEY (book_id, reader_id),
+	FOREIGN KEY (book_id) REFERENCES books(id)
+		ON DELETE CASCADE
+		ON UPDATE CASCADE,
+	FOREIGN KEY (reader_id) REFERENCES readers(id)
+		ON DELETE CASCADE
+		ON UPDATE CASCADE
+);
diff --git a/06-postgre-and-node/02-node-and-postgresql/01-connect.js b/06-postgre-and-node/02-node-and-postgresql/01-connect.js
new file mode 100644
index 0000000..de3f1ac
--- /dev/null
+++ b/06-postgre-and-node/02-node-and-postgresql/01-connect.js
@@ -0,0 +1,27 @@
+'use strict';
+
+const {Client} = require(`pg`);
+
+const connectionString = `postgres://academy:123456@localhost/phonebook`;
+const client = new Client(connectionString);
+
+client.connect((err) => {
+  if (err) {
+    throw new Error(`Ошибка установки соединения: ${err.message}`);
+  }
+
+  console.log(`Соединение с PostgreSQL установлено!`);
+});
+
+const sql = `SELECT * FROM peoples`;
+
+client.query(sql, (err, res) => {
+
+  if (err) {
+    throw new Error(`Ошибка при выполнении запроса: ${err.message}`);
+  }
+
+  console.table(res.rows);
+  client.end();
+});
+
diff --git a/06-postgre-and-node/02-node-and-postgresql/02-connect.js b/06-postgre-and-node/02-node-and-postgresql/02-connect.js
new file mode 100644
index 0000000..de092fc
--- /dev/null
+++ b/06-postgre-and-node/02-node-and-postgresql/02-connect.js
@@ -0,0 +1,14 @@
+'use strict';
+
+const {Client} = require(`pg`);
+
+const connectionString = `postgres://academy:123456@localhost/phonebook`;
+const client = new Client(connectionString);
+
+(async () => {
+  await client.connect();
+  const sql = `SELECT * FROM peoples`;
+  const {rows} = await client.query(sql);
+  console.table(rows);
+  client.end();
+})();
diff --git a/06-postgre-and-node/02-node-and-postgresql/03-bad-insert.js b/06-postgre-and-node/02-node-and-postgresql/03-bad-insert.js
new file mode 100644
index 0000000..36a55c3
--- /dev/null
+++ b/06-postgre-and-node/02-node-and-postgresql/03-bad-insert.js
@@ -0,0 +1,21 @@
+'use strict';
+
+const {Client} = require(`pg`);
+
+(async () => {
+  const connectionString = `postgres://academy:123456@localhost/phonebook`;
+
+  const firstname = `Axl`;
+  const lastname = `Rose`;
+  const birthDate = `1962-02-06`;
+  const email = `test@gr.local`;
+
+  const insertQuery = `INSERT INTO peoples
+  VALUES(DEFAULT, '${firstname}', '${lastname}', '${birthDate}', '${email}')`;
+
+  const client = new Client(connectionString);
+  await client.connect();
+  await client.query(insertQuery);
+
+  client.end();
+})();
diff --git a/06-postgre-and-node/02-node-and-postgresql/03-bad-select.js b/06-postgre-and-node/02-node-and-postgresql/03-bad-select.js
new file mode 100644
index 0000000..d8ec054
--- /dev/null
+++ b/06-postgre-and-node/02-node-and-postgresql/03-bad-select.js
@@ -0,0 +1,18 @@
+'use strict';
+
+const {Client} = require(`pg`);
+
+(async () => {
+  const connectionString = `postgres://academy:123456@localhost/phonebook`;
+  // const email = `bon@pisem.local`;
+  const email = `bon@pisem.local' OR 1='1`;
+  const sql = `SELECT * FROM peoples WHERE peoples.email = '${email}'`;
+
+  const client = new Client(connectionString);
+  await client.connect();
+  const {rows} = await client.query(sql);
+
+  console.table(rows);
+
+  client.end();
+})();
diff --git a/06-postgre-and-node/02-node-and-postgresql/03-insert.js b/06-postgre-and-node/02-node-and-postgresql/03-insert.js
new file mode 100644
index 0000000..f23f23b
--- /dev/null
+++ b/06-postgre-and-node/02-node-and-postgresql/03-insert.js
@@ -0,0 +1,20 @@
+'use strict';
+
+const {Client} = require(`pg`);
+
+(async () => {
+  const connectionString = `postgres://academy:123456@localhost/phonebook`;
+  const client = new Client(connectionString);
+
+  await client.connect();
+
+  const insertQuery = `INSERT INTO peoples VALUES (DEFAULT, $1, $2, $3, $4) RETURNING id`;
+  const resultInsertUser = await client.query(insertQuery, [`Axl`, `Rose`, `1962-02-06`, `test@gr.local`]);
+  const id = parseInt(resultInsertUser.rows[0].id, 10);
+
+  const selectLastRectord = `SELECT * FROM peoples WHERE peoples.id = $1`;
+  const userRecord = await client.query(selectLastRectord, [id]);
+
+  console.table(userRecord.rows);
+  client.end();
+})();
diff --git a/06-postgre-and-node/02-node-and-postgresql/04-prepared-insert.js b/06-postgre-and-node/02-node-and-postgresql/04-prepared-insert.js
new file mode 100644
index 0000000..e69de29
diff --git a/06-postgre-and-node/02-node-and-postgresql/05-delete.js b/06-postgre-and-node/02-node-and-postgresql/05-delete.js
new file mode 100644
index 0000000..e132294
--- /dev/null
+++ b/06-postgre-and-node/02-node-and-postgresql/05-delete.js
@@ -0,0 +1,15 @@
+'use strict';
+
+const {Client} = require(`pg`);
+
+(async () => {
+  const connectionString = `postgres://academy:123456@localhost/phonebook`;
+  const client = new Client(connectionString);
+
+  await client.connect();
+
+  const deleteQuery = `DELETE FROM peoples WHERE peoples.email = $1`;
+  const resultDelete = await client.query(deleteQuery, [`test@gr.local`]);
+  console.log(`Удалено записей: ${resultDelete.rowCount}`);
+  client.end();
+})();
diff --git a/06-postgre-and-node/02-node-and-postgresql/06-pool.js b/06-postgre-and-node/02-node-and-postgresql/06-pool.js
new file mode 100644
index 0000000..a1505f2
--- /dev/null
+++ b/06-postgre-and-node/02-node-and-postgresql/06-pool.js
@@ -0,0 +1,24 @@
+'use strict';
+
+const {Pool} = require(`pg`);
+
+const pool = new Pool({
+  host: `localhost`,
+  port: 5432,
+  database: `phonebook`,
+  user: `academy`,
+  password: `123456`,
+});
+
+(async () => {
+  const client = await pool.connect();
+  const sql = `SELECT * FROM peoples`;
+  const {rows} = await client.query(sql);
+  client.release();
+
+  console.table(rows);
+
+  // При завершении работы приложения
+  pool.end();
+})();
+
diff --git a/06-postgre-and-node/02-node-and-postgresql/package-lock.json b/06-postgre-and-node/02-node-and-postgresql/package-lock.json
new file mode 100644
index 0000000..a117b7c
--- /dev/null
+++ b/06-postgre-and-node/02-node-and-postgresql/package-lock.json
@@ -0,0 +1,119 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "buffer-writer": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/buffer-writer/-/buffer-writer-2.0.0.tgz",
+      "integrity": "sha512-a7ZpuTZU1TRtnwyCNW3I5dc0wWNC3VR9S++Ewyk2HHZdrO3CQJqSpd+95Us590V6AL7JqUAH2IwZ/398PmNFgw=="
+    },
+    "packet-reader": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/packet-reader/-/packet-reader-1.0.0.tgz",
+      "integrity": "sha512-HAKu/fG3HpHFO0AA8WE8q2g+gBJaZ9MG7fcKk+IJPLTGAD6Psw4443l+9DGRbOIh3/aXr7Phy0TjilYivJo5XQ=="
+    },
+    "pg": {
+      "version": "8.0.2",
+      "resolved": "https://registry.npmjs.org/pg/-/pg-8.0.2.tgz",
+      "integrity": "sha512-ngOUEDk69kLdH/k/YLT2NRIBcUiPFRcY4l51dviqn79P5qIa5jBIGIFTIGXh4OlT/6gpiCAza5a9uy08izpFQQ==",
+      "requires": {
+        "buffer-writer": "2.0.0",
+        "packet-reader": "1.0.0",
+        "pg-connection-string": "0.1.3",
+        "pg-pool": "^3.1.0",
+        "pg-protocol": "^1.2.1",
+        "pg-types": "^2.1.0",
+        "pgpass": "1.x",
+        "semver": "4.3.2"
+      }
+    },
+    "pg-connection-string": {
+      "version": "0.1.3",
+      "resolved": "https://registry.npmjs.org/pg-connection-string/-/pg-connection-string-0.1.3.tgz",
+      "integrity": "sha1-2hhHsglA5C7hSSvq9l1J2RskXfc="
+    },
+    "pg-int8": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/pg-int8/-/pg-int8-1.0.1.tgz",
+      "integrity": "sha512-WCtabS6t3c8SkpDBUlb1kjOs7l66xsGdKpIPZsg4wR+B3+u9UAum2odSsF9tnvxg80h4ZxLWMy4pRjOsFIqQpw=="
+    },
+    "pg-pool": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/pg-pool/-/pg-pool-3.1.0.tgz",
+      "integrity": "sha512-CvxGctDwjZZad6Q7vvhFA4BsYdk26UFIZaFH0XXqHId5uBOc26vco/GFh/laUVIQUpD9IKe/f9/mr/OQHyQ2ZA=="
+    },
+    "pg-protocol": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/pg-protocol/-/pg-protocol-1.2.1.tgz",
+      "integrity": "sha512-IqZ+VUOqg3yydxSt5NgNKLVK9JgPBuzq4ZbA9GmrmIkQjQAszPT9DLqTtID0mKsLEZB68PU0gjLla561WZ2QkQ=="
+    },
+    "pg-types": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/pg-types/-/pg-types-2.2.0.tgz",
+      "integrity": "sha512-qTAAlrEsl8s4OiEQY69wDvcMIdQN6wdz5ojQiOy6YRMuynxenON0O5oCpJI6lshc6scgAY8qvJ2On/p+CXY0GA==",
+      "requires": {
+        "pg-int8": "1.0.1",
+        "postgres-array": "~2.0.0",
+        "postgres-bytea": "~1.0.0",
+        "postgres-date": "~1.0.4",
+        "postgres-interval": "^1.1.0"
+      }
+    },
+    "pgpass": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/pgpass/-/pgpass-1.0.2.tgz",
+      "integrity": "sha1-Knu0G2BltnkH6R2hsHwYR8h3swY=",
+      "requires": {
+        "split": "^1.0.0"
+      }
+    },
+    "postgres-array": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/postgres-array/-/postgres-array-2.0.0.tgz",
+      "integrity": "sha512-VpZrUqU5A69eQyW2c5CA1jtLecCsN2U/bD6VilrFDWq5+5UIEVO7nazS3TEcHf1zuPYO/sqGvUvW62g86RXZuA=="
+    },
+    "postgres-bytea": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/postgres-bytea/-/postgres-bytea-1.0.0.tgz",
+      "integrity": "sha1-AntTPAqokOJtFy1Hz5zOzFIazTU="
+    },
+    "postgres-date": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/postgres-date/-/postgres-date-1.0.5.tgz",
+      "integrity": "sha512-pdau6GRPERdAYUQwkBnGKxEfPyhVZXG/JiS44iZWiNdSOWE09N2lUgN6yshuq6fVSon4Pm0VMXd1srUUkLe9iA=="
+    },
+    "postgres-interval": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/postgres-interval/-/postgres-interval-1.2.0.tgz",
+      "integrity": "sha512-9ZhXKM/rw350N1ovuWHbGxnGh/SNJ4cnxHiM0rxE4VN41wsg8P8zWn9hv/buK00RP4WvlOyr/RBDiptyxVbkZQ==",
+      "requires": {
+        "xtend": "^4.0.0"
+      }
+    },
+    "semver": {
+      "version": "4.3.2",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-4.3.2.tgz",
+      "integrity": "sha1-x6BxWKgL7dBSNVt3DYLWZA+AO+c="
+    },
+    "split": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/split/-/split-1.0.1.tgz",
+      "integrity": "sha512-mTyOoPbrivtXnwnIxZRFYRrPNtEFKlpB2fvjSnCQUiAA6qAZzqwna5envK4uk6OIeP17CsdF3rSBGYVBsU0Tkg==",
+      "requires": {
+        "through": "2"
+      }
+    },
+    "through": {
+      "version": "2.3.8",
+      "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
+      "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU="
+    },
+    "xtend": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
+      "integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ=="
+    }
+  }
+}
diff --git a/06-postgre-and-node/02-node-and-postgresql/package.json b/06-postgre-and-node/02-node-and-postgresql/package.json
new file mode 100644
index 0000000..220f809
--- /dev/null
+++ b/06-postgre-and-node/02-node-and-postgresql/package.json
@@ -0,0 +1,15 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "description": "",
+  "main": "01-connect.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "pg": "8.0.2"
+  }
+}
diff --git a/06-postgre-and-node/04-sequelize/01-connect.js b/06-postgre-and-node/04-sequelize/01-connect.js
new file mode 100644
index 0000000..83eef9a
--- /dev/null
+++ b/06-postgre-and-node/04-sequelize/01-connect.js
@@ -0,0 +1,17 @@
+'use strict';
+
+const Sequelize = require(`sequelize`);
+
+(async () => {
+  const sequelize = new Sequelize(`library`, `academy`, `123456`, {
+    host: `localhost`,
+    dialect: `postgres`,
+  });
+
+  try {
+    await sequelize.authenticate();
+    console.log(`Соединение с сервером установлено!`);
+  } catch (err) {
+    console.error(`Не удалось установить соединение по причине: ${err}`);
+  }
+})();
diff --git a/06-postgre-and-node/04-sequelize/02-models-define.js b/06-postgre-and-node/04-sequelize/02-models-define.js
new file mode 100644
index 0000000..04b3b5e
--- /dev/null
+++ b/06-postgre-and-node/04-sequelize/02-models-define.js
@@ -0,0 +1,24 @@
+'use strict';
+
+const Sequelize = require(`sequelize`);
+
+(async () => {
+  const sequelize = new Sequelize(`library`, `academy`, `123456`, {
+    host: `localhost`,
+    dialect: `postgres`,
+  });
+
+  const Reader = require(`./models/reader`)(sequelize);
+
+  await sequelize.sync()
+    .catch((err) => console.err(err));
+
+  // Добавление записей
+  const result = await Reader.create({
+      firstname: `Ivan`,
+      lastname: `Ivanov`,
+      birthDate: new Date(`1986-01-01`),
+  });
+
+  console.log(`Идентификатор новой записи: ${result.id}`);
+})();
diff --git a/06-postgre-and-node/04-sequelize/03-get-data.js b/06-postgre-and-node/04-sequelize/03-get-data.js
new file mode 100644
index 0000000..81e89a5
--- /dev/null
+++ b/06-postgre-and-node/04-sequelize/03-get-data.js
@@ -0,0 +1,32 @@
+'use strict';
+
+const Sequelize = require(`sequelize`);
+
+(async () => {
+  const sequelize = new Sequelize(`library`, `academy`, `123456`, {
+    host: `localhost`,
+    dialect: `postgres`,
+  });
+
+  const Reader = require(`./models/reader`)(sequelize);
+
+  // Все записи из таблицы `Readers`
+  const allEntries = await Reader.findAll({raw: true});
+  console.log(allEntries);
+
+  // Получаем запись с `id` равным 2
+  console.info(`*** Выборка записи с идентификатором 2:`);
+  const entry = await Reader.findByPk(2, {raw: true});
+  console.log(entry);
+
+  // Удаляем запись с `id` равным 2
+  console.info(`*** Удаление записи с идентификатором 2:`)
+  const deletedEntry = await Reader.destroy({
+      where: {
+          id: 2
+      }
+  });
+  console.log(deletedEntry)
+
+
+})();
diff --git a/06-postgre-and-node/04-sequelize/models/reader.js b/06-postgre-and-node/04-sequelize/models/reader.js
new file mode 100644
index 0000000..11a30b5
--- /dev/null
+++ b/06-postgre-and-node/04-sequelize/models/reader.js
@@ -0,0 +1,33 @@
+'use strict';
+
+const {Model, DataTypes} = require(`sequelize`);
+
+module.exports = (sequelize) => {
+    class Reader extends Model{}
+    Reader.init({
+        id: {
+            type: DataTypes.INTEGER,
+            autoIncrement: true,
+            primaryKey: true,
+            allowNull: false,
+        },
+        firstname: {
+          type: DataTypes.STRING,
+          allowNull: false,
+        },
+        lastname: {
+          type: DataTypes.STRING,
+          allowNull: false,
+        },
+        birthDate: {
+          type: DataTypes.DATE,
+          allowNull: false,
+        },
+    }, {
+        sequelize,
+        timestamps: true,
+        paranoid: true,
+    });
+
+    return Reader;
+};
diff --git a/06-postgre-and-node/04-sequelize/package-lock.json b/06-postgre-and-node/04-sequelize/package-lock.json
new file mode 100644
index 0000000..0176b01
--- /dev/null
+++ b/06-postgre-and-node/04-sequelize/package-lock.json
@@ -0,0 +1,259 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@types/node": {
+      "version": "13.13.4",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-13.13.4.tgz",
+      "integrity": "sha512-x26ur3dSXgv5AwKS0lNfbjpCakGIduWU1DU91Zz58ONRWrIKGunmZBNv4P7N+e27sJkiGDsw/3fT4AtsqQBrBA=="
+    },
+    "any-promise": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/any-promise/-/any-promise-1.3.0.tgz",
+      "integrity": "sha1-q8av7tzqUugJzcA3au0845Y10X8="
+    },
+    "bluebird": {
+      "version": "3.7.2",
+      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.7.2.tgz",
+      "integrity": "sha512-XpNj6GDQzdfW+r2Wnn7xiSAd7TM3jzkxGXBGTtWKuSXv1xUV+azxAm8jdWZN06QTQk+2N2XB9jRDkvbmQmcRtg=="
+    },
+    "buffer-writer": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/buffer-writer/-/buffer-writer-2.0.0.tgz",
+      "integrity": "sha512-a7ZpuTZU1TRtnwyCNW3I5dc0wWNC3VR9S++Ewyk2HHZdrO3CQJqSpd+95Us590V6AL7JqUAH2IwZ/398PmNFgw=="
+    },
+    "cls-bluebird": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/cls-bluebird/-/cls-bluebird-2.1.0.tgz",
+      "integrity": "sha1-N+8eCAqP+1XC9BZPU28ZGeeWiu4=",
+      "requires": {
+        "is-bluebird": "^1.0.2",
+        "shimmer": "^1.1.0"
+      }
+    },
+    "debug": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
+      "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
+      "requires": {
+        "ms": "^2.1.1"
+      }
+    },
+    "dottie": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/dottie/-/dottie-2.0.2.tgz",
+      "integrity": "sha512-fmrwR04lsniq/uSr8yikThDTrM7epXHBAAjH9TbeH3rEA8tdCO7mRzB9hdmdGyJCxF8KERo9CITcm3kGuoyMhg=="
+    },
+    "inflection": {
+      "version": "1.12.0",
+      "resolved": "https://registry.npmjs.org/inflection/-/inflection-1.12.0.tgz",
+      "integrity": "sha1-ogCTVlbW9fa8TcdQLhrstwMihBY="
+    },
+    "is-bluebird": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/is-bluebird/-/is-bluebird-1.0.2.tgz",
+      "integrity": "sha1-CWQ5Bg9KpBGr7hkUOoTWpVNG1uI="
+    },
+    "lodash": {
+      "version": "4.17.15",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
+      "integrity": "sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A=="
+    },
+    "moment": {
+      "version": "2.24.0",
+      "resolved": "https://registry.npmjs.org/moment/-/moment-2.24.0.tgz",
+      "integrity": "sha512-bV7f+6l2QigeBBZSM/6yTNq4P2fNpSWj/0e7jQcy87A8e7o2nAfP/34/2ky5Vw4B9S446EtIhodAzkFCcR4dQg=="
+    },
+    "moment-timezone": {
+      "version": "0.5.28",
+      "resolved": "https://registry.npmjs.org/moment-timezone/-/moment-timezone-0.5.28.tgz",
+      "integrity": "sha512-TDJkZvAyKIVWg5EtVqRzU97w0Rb0YVbfpqyjgu6GwXCAohVRqwZjf4fOzDE6p1Ch98Sro/8hQQi65WDXW5STPw==",
+      "requires": {
+        "moment": ">= 2.9.0"
+      }
+    },
+    "ms": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+      "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w=="
+    },
+    "packet-reader": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/packet-reader/-/packet-reader-1.0.0.tgz",
+      "integrity": "sha512-HAKu/fG3HpHFO0AA8WE8q2g+gBJaZ9MG7fcKk+IJPLTGAD6Psw4443l+9DGRbOIh3/aXr7Phy0TjilYivJo5XQ=="
+    },
+    "pg": {
+      "version": "8.0.3",
+      "resolved": "https://registry.npmjs.org/pg/-/pg-8.0.3.tgz",
+      "integrity": "sha512-fvcNXn4o/iq4jKq15Ix/e58q3jPSmzOp6/8C3CaHoSR/bsxdg+1FXfDRePdtE/zBb3++TytvOrS1hNef3WC/Kg==",
+      "requires": {
+        "buffer-writer": "2.0.0",
+        "packet-reader": "1.0.0",
+        "pg-connection-string": "0.1.3",
+        "pg-pool": "^3.1.1",
+        "pg-protocol": "^1.2.2",
+        "pg-types": "^2.1.0",
+        "pgpass": "1.x",
+        "semver": "4.3.2"
+      }
+    },
+    "pg-connection-string": {
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+        "pg-int8": "1.0.1",
+        "postgres-array": "~2.0.0",
+        "postgres-bytea": "~1.0.0",
+        "postgres-date": "~1.0.4",
+        "postgres-interval": "^1.1.0"
+      }
+    },
+    "pgpass": {
+      "version": "1.0.2",
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+      "integrity": "sha1-Knu0G2BltnkH6R2hsHwYR8h3swY=",
+      "requires": {
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+      }
+    },
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+    },
+    "postgres-interval": {
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+      "requires": {
+        "xtend": "^4.0.0"
+      }
+    },
+    "retry-as-promised": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/retry-as-promised/-/retry-as-promised-3.2.0.tgz",
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+      "requires": {
+        "any-promise": "^1.3.0"
+      }
+    },
+    "semver": {
+      "version": "4.3.2",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-4.3.2.tgz",
+      "integrity": "sha1-x6BxWKgL7dBSNVt3DYLWZA+AO+c="
+    },
+    "sequelize": {
+      "version": "5.21.7",
+      "resolved": "https://registry.npmjs.org/sequelize/-/sequelize-5.21.7.tgz",
+      "integrity": "sha512-+JrS5Co7CN53cOFFFaUb+xqQP00wD1Ag9xGLBLoUko2KhRZxjm+UDkqAVPHTUp87McLwJaCPkKv61GPhBVloRQ==",
+      "requires": {
+        "bluebird": "^3.5.0",
+        "cls-bluebird": "^2.1.0",
+        "debug": "^4.1.1",
+        "dottie": "^2.0.0",
+        "inflection": "1.12.0",
+        "lodash": "^4.17.15",
+        "moment": "^2.24.0",
+        "moment-timezone": "^0.5.21",
+        "retry-as-promised": "^3.2.0",
+        "semver": "^6.3.0",
+        "sequelize-pool": "^2.3.0",
+        "toposort-class": "^1.0.1",
+        "uuid": "^3.3.3",
+        "validator": "^10.11.0",
+        "wkx": "^0.4.8"
+      },
+      "dependencies": {
+        "semver": {
+          "version": "6.3.0",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.0.tgz",
+          "integrity": "sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw=="
+        }
+      }
+    },
+    "sequelize-pool": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/sequelize-pool/-/sequelize-pool-2.3.0.tgz",
+      "integrity": "sha512-Ibz08vnXvkZ8LJTiUOxRcj1Ckdn7qafNZ2t59jYHMX1VIebTAOYefWdRYFt6z6+hy52WGthAHAoLc9hvk3onqA=="
+    },
+    "shimmer": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/shimmer/-/shimmer-1.2.1.tgz",
+      "integrity": "sha512-sQTKC1Re/rM6XyFM6fIAGHRPVGvyXfgzIDvzoq608vM+jeyVD0Tu1E6Np0Kc2zAIFWIj963V2800iF/9LPieQw=="
+    },
+    "split": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/split/-/split-1.0.1.tgz",
+      "integrity": "sha512-mTyOoPbrivtXnwnIxZRFYRrPNtEFKlpB2fvjSnCQUiAA6qAZzqwna5envK4uk6OIeP17CsdF3rSBGYVBsU0Tkg==",
+      "requires": {
+        "through": "2"
+      }
+    },
+    "through": {
+      "version": "2.3.8",
+      "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
+      "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU="
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+    "toposort-class": {
+      "version": "1.0.1",
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+      "integrity": "sha1-f/0feMi+KMO6Rc1OGj9e4ZO9mYg="
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+    },
+    "wkx": {
+      "version": "0.4.8",
+      "resolved": "https://registry.npmjs.org/wkx/-/wkx-0.4.8.tgz",
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+      "requires": {
+        "@types/node": "*"
+      }
+    },
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+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
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+    }
+  }
+}
diff --git a/06-postgre-and-node/04-sequelize/package.json b/06-postgre-and-node/04-sequelize/package.json
new file mode 100644
index 0000000..dfcebd5
--- /dev/null
+++ b/06-postgre-and-node/04-sequelize/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "description": "",
+  "main": "01-connect.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "pg": "8.0.3",
+    "sequelize": "5.21.7"
+  }
+}
diff --git a/06-postgre-and-node/05-sequelize-part-2/01-where.js b/06-postgre-and-node/05-sequelize-part-2/01-where.js
new file mode 100644
index 0000000..df865f1
--- /dev/null
+++ b/06-postgre-and-node/05-sequelize-part-2/01-where.js
@@ -0,0 +1,53 @@
+'use strict';
+
+const Sequelize = require(`sequelize`);
+
+(async () => {
+  const sequelize = new Sequelize(`library`, `academy`, `123456`, {
+    host: `localhost`,
+    dialect: `postgres`,
+  });
+
+  const Reader = require(`./models/reader`)(sequelize);
+  const Operator = Sequelize.Op;
+
+  // Читатели с именами Ivan и Jon
+  console.info(`*** Jon и Ivan`)
+  const entries = await Reader.findAll({
+      where: {
+        [Operator.or]: [{firstname: `Ivan`}, {firstname: `Jon`}],
+      },
+      raw: true
+    });
+
+ console.log(entries); // 2 записи
+
+ // Читатели Ivan и Jon, которые родились
+ // после 80-го года
+ console.info(`*** Jon и Ivan`);
+ const entries2 = await Reader.findAll({
+     where: {
+        [Operator.or]: [{firstname: `Ivan`}, {firstname: `Jon`}],
+        [Operator.and]: {
+            birthDate: {
+                [Operator.gt]: `1980-01-01`
+            }
+        }
+     },
+    raw: true,
+ });
+ console.log(entries2);
+
+ // Jon и Ivan, оператор IN
+ console.info(`*** Jon и Ivan`);
+ const entries3 = await Reader.findAll({
+     where: {
+         firstname: {
+             [Operator.in]: [`Ivan`, `Jon`]
+         }
+     },
+     raw: true,
+ });
+ console.log(entries3);
+
+})();
diff --git a/06-postgre-and-node/05-sequelize-part-2/02-update.js b/06-postgre-and-node/05-sequelize-part-2/02-update.js
new file mode 100644
index 0000000..515dcb3
--- /dev/null
+++ b/06-postgre-and-node/05-sequelize-part-2/02-update.js
@@ -0,0 +1,19 @@
+'use strict';
+
+const Sequelize = require(`sequelize`);
+
+(async () => {
+  const sequelize = new Sequelize(`library`, `academy`, `123456`, {
+    host: `localhost`,
+    dialect: `postgres`,
+  });
+
+  const id = 1;
+  const Reader = require(`./models/reader`)(sequelize);
+  const entry = await Reader.findByPk(id);
+  entry.birthDate = new Date(`1990-02-03`);
+  entry.lastname = `Sidorov`;
+  await entry.save();
+
+  sequelize.close();
+})();
diff --git a/06-postgre-and-node/05-sequelize-part-2/03-update-part-2.js b/06-postgre-and-node/05-sequelize-part-2/03-update-part-2.js
new file mode 100644
index 0000000..7e4cd8d
--- /dev/null
+++ b/06-postgre-and-node/05-sequelize-part-2/03-update-part-2.js
@@ -0,0 +1,20 @@
+'use strict';
+
+const Sequelize = require(`sequelize`);
+
+(async () => {
+  const sequelize = new Sequelize(`library`, `academy`, `123456`, {
+    host: `localhost`,
+    dialect: `postgres`,
+  });
+
+  const id = 1;
+  const Reader = require(`./models/reader`)(sequelize);
+  await Reader.update({ firstname: `Igor`}, {
+      where: {
+          id,
+      },
+  });
+
+  sequelize.close();
+})();
diff --git a/06-postgre-and-node/05-sequelize-part-2/04-bulk-create.js b/06-postgre-and-node/05-sequelize-part-2/04-bulk-create.js
new file mode 100644
index 0000000..eefa680
--- /dev/null
+++ b/06-postgre-and-node/05-sequelize-part-2/04-bulk-create.js
@@ -0,0 +1,28 @@
+'use strict';
+
+const path = require(`path`);
+const Sequelize = require(`sequelize`);
+
+(async () => {
+  const sequelize = new Sequelize(`library`, `academy`, `123456`, {
+    host: `localhost`,
+    dialect: `postgres`,
+  });
+
+  const Reader = require(`./models/reader`)(sequelize);
+  const newReaders = [
+    {
+        firstname: `Ralph`,
+        lastname: `Roberts`,
+        birthDate: new Date(`1947-08-29`)
+    },
+    {
+        firstname: `Jon`,
+        lastname: `Bon Jovi`,
+        birthDate: new Date(`1962-03-02`)
+    },
+  ];
+
+  await Reader.bulkCreate(newReaders);
+  sequelize.close();
+})();
diff --git a/06-postgre-and-node/05-sequelize-part-2/05-count.js b/06-postgre-and-node/05-sequelize-part-2/05-count.js
new file mode 100644
index 0000000..97d7e93
--- /dev/null
+++ b/06-postgre-and-node/05-sequelize-part-2/05-count.js
@@ -0,0 +1,20 @@
+'use strict';
+
+const Sequelize = require(`sequelize`);
+
+(async () => {
+  const sequelize = new Sequelize(`library`, `academy`, `123456`, {
+    host: `localhost`,
+    dialect: `postgres`,
+  });
+
+  const Reader = require(`./models/reader`)(sequelize);
+  const result = await Reader.count({
+      where: {
+          firstname: `Jon`,
+      },
+  });
+
+  console.log(`Количество читателей с именем Jon: ${result}`);
+  sequelize.close();
+})();
diff --git a/06-postgre-and-node/05-sequelize-part-2/06-order-by.js b/06-postgre-and-node/05-sequelize-part-2/06-order-by.js
new file mode 100644
index 0000000..9171953
--- /dev/null
+++ b/06-postgre-and-node/05-sequelize-part-2/06-order-by.js
@@ -0,0 +1,21 @@
+'use strict';
+
+const Sequelize = require(`sequelize`);
+
+(async () => {
+  const sequelize = new Sequelize(`library`, `academy`, `123456`, {
+    host: `localhost`,
+    dialect: `postgres`,
+  });
+
+  const Reader = require(`./models/reader`)(sequelize);
+  const result = await Reader.findAll({
+      order: [
+          [`birthDate`, `DESC`]
+      ],
+      raw: true,
+  });
+
+  console.log(result);
+  sequelize.close();
+})();
diff --git a/06-postgre-and-node/05-sequelize-part-2/07-limit.js b/06-postgre-and-node/05-sequelize-part-2/07-limit.js
new file mode 100644
index 0000000..33daaad
--- /dev/null
+++ b/06-postgre-and-node/05-sequelize-part-2/07-limit.js
@@ -0,0 +1,20 @@
+'use strict';
+
+const Sequelize = require(`sequelize`);
+
+(async () => {
+  const sequelize = new Sequelize(`library`, `academy`, `123456`, {
+    host: `localhost`,
+    dialect: `postgres`,
+  });
+
+  const Reader = require(`./models/reader`)(sequelize);
+  const result = await Reader.findAll({
+      limit: 1,
+      offset: 2,
+      raw: true,
+  });
+
+  console.log(result);
+  sequelize.close();
+})();
diff --git a/06-postgre-and-node/05-sequelize-part-2/models/reader.js b/06-postgre-and-node/05-sequelize-part-2/models/reader.js
new file mode 100644
index 0000000..11a30b5
--- /dev/null
+++ b/06-postgre-and-node/05-sequelize-part-2/models/reader.js
@@ -0,0 +1,33 @@
+'use strict';
+
+const {Model, DataTypes} = require(`sequelize`);
+
+module.exports = (sequelize) => {
+    class Reader extends Model{}
+    Reader.init({
+        id: {
+            type: DataTypes.INTEGER,
+            autoIncrement: true,
+            primaryKey: true,
+            allowNull: false,
+        },
+        firstname: {
+          type: DataTypes.STRING,
+          allowNull: false,
+        },
+        lastname: {
+          type: DataTypes.STRING,
+          allowNull: false,
+        },
+        birthDate: {
+          type: DataTypes.DATE,
+          allowNull: false,
+        },
+    }, {
+        sequelize,
+        timestamps: true,
+        paranoid: true,
+    });
+
+    return Reader;
+};
diff --git a/06-postgre-and-node/05-sequelize-part-2/package-lock.json b/06-postgre-and-node/05-sequelize-part-2/package-lock.json
new file mode 100644
index 0000000..0176b01
--- /dev/null
+++ b/06-postgre-and-node/05-sequelize-part-2/package-lock.json
@@ -0,0 +1,259 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@types/node": {
+      "version": "13.13.4",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-13.13.4.tgz",
+      "integrity": "sha512-x26ur3dSXgv5AwKS0lNfbjpCakGIduWU1DU91Zz58ONRWrIKGunmZBNv4P7N+e27sJkiGDsw/3fT4AtsqQBrBA=="
+    },
+    "any-promise": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/any-promise/-/any-promise-1.3.0.tgz",
+      "integrity": "sha1-q8av7tzqUugJzcA3au0845Y10X8="
+    },
+    "bluebird": {
+      "version": "3.7.2",
+      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.7.2.tgz",
+      "integrity": "sha512-XpNj6GDQzdfW+r2Wnn7xiSAd7TM3jzkxGXBGTtWKuSXv1xUV+azxAm8jdWZN06QTQk+2N2XB9jRDkvbmQmcRtg=="
+    },
+    "buffer-writer": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/buffer-writer/-/buffer-writer-2.0.0.tgz",
+      "integrity": "sha512-a7ZpuTZU1TRtnwyCNW3I5dc0wWNC3VR9S++Ewyk2HHZdrO3CQJqSpd+95Us590V6AL7JqUAH2IwZ/398PmNFgw=="
+    },
+    "cls-bluebird": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/cls-bluebird/-/cls-bluebird-2.1.0.tgz",
+      "integrity": "sha1-N+8eCAqP+1XC9BZPU28ZGeeWiu4=",
+      "requires": {
+        "is-bluebird": "^1.0.2",
+        "shimmer": "^1.1.0"
+      }
+    },
+    "debug": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
+      "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
+      "requires": {
+        "ms": "^2.1.1"
+      }
+    },
+    "dottie": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/dottie/-/dottie-2.0.2.tgz",
+      "integrity": "sha512-fmrwR04lsniq/uSr8yikThDTrM7epXHBAAjH9TbeH3rEA8tdCO7mRzB9hdmdGyJCxF8KERo9CITcm3kGuoyMhg=="
+    },
+    "inflection": {
+      "version": "1.12.0",
+      "resolved": "https://registry.npmjs.org/inflection/-/inflection-1.12.0.tgz",
+      "integrity": "sha1-ogCTVlbW9fa8TcdQLhrstwMihBY="
+    },
+    "is-bluebird": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/is-bluebird/-/is-bluebird-1.0.2.tgz",
+      "integrity": "sha1-CWQ5Bg9KpBGr7hkUOoTWpVNG1uI="
+    },
+    "lodash": {
+      "version": "4.17.15",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
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+        "toposort-class": "^1.0.1",
+        "uuid": "^3.3.3",
+        "validator": "^10.11.0",
+        "wkx": "^0.4.8"
+      },
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diff --git a/06-postgre-and-node/05-sequelize-part-2/package.json b/06-postgre-and-node/05-sequelize-part-2/package.json
new file mode 100644
index 0000000..dfcebd5
--- /dev/null
+++ b/06-postgre-and-node/05-sequelize-part-2/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "description": "",
+  "main": "01-connect.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "pg": "8.0.3",
+    "sequelize": "5.21.7"
+  }
+}
diff --git a/06-postgre-and-node/05-sequelize-part-2/readers.sql b/06-postgre-and-node/05-sequelize-part-2/readers.sql
new file mode 100644
index 0000000..4268a35
--- /dev/null
+++ b/06-postgre-and-node/05-sequelize-part-2/readers.sql
@@ -0,0 +1,49 @@
+/*
+ Navicat Premium Data Transfer
+
+ Source Server         : local
+ Source Server Type    : PostgreSQL
+ Source Server Version : 120002
+ Source Host           : localhost:5432
+ Source Catalog        : library
+ Source Schema         : public
+
+ Target Server Type    : PostgreSQL
+ Target Server Version : 120002
+ File Encoding         : 65001
+
+ Date: 30/04/2020 17:05:53
+*/
+
+
+-- ----------------------------
+-- Table structure for Readers
+-- ----------------------------
+DROP TABLE IF EXISTS "public"."Readers";
+CREATE TABLE "public"."Readers" (
+  "id" int4 NOT NULL DEFAULT nextval('"Readers_id_seq"'::regclass),
+  "firstname" varchar(255) COLLATE "pg_catalog"."default" NOT NULL,
+  "lastname" varchar(255) COLLATE "pg_catalog"."default" NOT NULL,
+  "birthDate" timestamptz(6) NOT NULL,
+  "createdAt" timestamptz(6) NOT NULL,
+  "updatedAt" timestamptz(6) NOT NULL,
+  "deletedAt" timestamptz(6)
+)
+;
+ALTER TABLE "public"."Readers" OWNER TO "academy";
+
+-- ----------------------------
+-- Records of Readers
+-- ----------------------------
+BEGIN;
+INSERT INTO "public"."Readers" VALUES (1, 'Ivan', 'Ivanov', '1986-01-01 10:00:00+10', '2020-04-01 00:00:00+10', '2020-04-01 00:00:00+10', NULL);
+INSERT INTO "public"."Readers" VALUES (3, 'Jon', 'Smith', '1970-02-01 10:00:00+10', '2020-04-01 00:00:00+10', '2020-04-01 00:00:00+10', NULL);
+INSERT INTO "public"."Readers" VALUES (4, 'Alex', 'Such', '1989-11-14 10:00:00+10', '2020-04-01 00:00:00+10', '2020-04-01 00:00:00+10', NULL);
+INSERT INTO "public"."Readers" VALUES (5, 'Gram', 'Dathon', '1981-01-01 10:00:00+10', '2020-04-01 00:00:00+10', '2020-04-01 00:00:00+10', NULL);
+INSERT INTO "public"."Readers" VALUES (2, 'Ludwig', 'Aram', '1955-01-01 10:00:00+10', '2020-04-01 00:00:00+10', '2020-04-01 00:00:00+10', NULL);
+COMMIT;
+
+-- ----------------------------
+-- Primary Key structure for table Readers
+-- ----------------------------
+ALTER TABLE "public"."Readers" ADD CONSTRAINT "Readers_pkey" PRIMARY KEY ("id");
diff --git a/06-postgre-and-node/06-relations/01-one-to-many.js b/06-postgre-and-node/06-relations/01-one-to-many.js
new file mode 100644
index 0000000..6bddcf9
--- /dev/null
+++ b/06-postgre-and-node/06-relations/01-one-to-many.js
@@ -0,0 +1,30 @@
+'use strict';
+
+const { db, sequelize } = require(`./db`);
+
+(async() => {
+
+    // Получить книгу с идентификатором 2
+    // включая информацию об авторе
+    const book = await db.Book.findByPk(2, {
+        include: [`author`],
+    });
+
+    const { title, author } = book;
+    console.log(`${title} — ${author.firstname} ${author.lastname}`);
+
+    // Все книги автора
+    const someAuthor = await db.Author.findByPk(2);
+    const allAuthorsBooks = await someAuthor.getBooks({raw: true});
+    console.log(allAuthorsBooks);
+
+    // Добавим новую книгу для автору
+    const newBook = {
+        title: `Звёзды — холодные игрушки`,
+        pageCount: 999,
+        releaseDate: `1998-02-01`
+    };
+
+    await someAuthor.createBook(newBook);
+    await sequelize.close();
+})();
diff --git a/06-postgre-and-node/06-relations/02-many-to-many.js b/06-postgre-and-node/06-relations/02-many-to-many.js
new file mode 100644
index 0000000..73b6177
--- /dev/null
+++ b/06-postgre-and-node/06-relations/02-many-to-many.js
@@ -0,0 +1,40 @@
+'use strict';
+
+const { db, sequelize, initDb } = require(`./db`);
+const { Op } = require(`sequelize`);
+
+(async() => {
+
+    const { Genre, Book } = db;
+
+    // Пересоздадим все таблицы и заполним
+    // начальными данными
+    await initDb();
+
+    // Найдём жанры «Драма» и «Фантастика»
+    const genres = await Genre.findAll({
+        where: {
+            id: {
+                [Op.in]: [1, 3]
+            }
+        },
+    });
+
+    // Книга «Черновик»
+    const book = await Book.findByPk(7);
+    await book.addGenres(genres);
+
+    // Получим все жанры для книги «Черновик»
+    const bookGenres = await book.getGenres({ raw: true});
+    console.log(bookGenres);
+
+    // И наоборот, все книги для жанра «Фантастика»
+    const [fantasyGenre] = genres;
+    const fantasyBooks = await fantasyGenre.getBooks({ raw: true});
+    console.log(fantasyBooks);
+
+    // Попробуем удалить жанры для книги
+    await book.removeGenre(fantasyGenre);
+
+    await sequelize.close();
+})();
diff --git a/06-postgre-and-node/06-relations/db.js b/06-postgre-and-node/06-relations/db.js
new file mode 100644
index 0000000..56ad97d
--- /dev/null
+++ b/06-postgre-and-node/06-relations/db.js
@@ -0,0 +1,63 @@
+'use strict';
+
+const Sequelize = require(`sequelize`);
+const { genres, authors, books } = require(`./mocks`);
+
+const sequelize = new Sequelize(`library`, `academy`, `123456`, {
+    host: `localhost`,
+    dialect: `postgres`,
+});
+
+const Reader = require(`./models/reader`)(sequelize);
+const Author = require(`./models/author`)(sequelize);
+const Book = require(`./models/book`)(sequelize);
+const Genre = require(`./models/genre`)(sequelize);
+
+// Один-ко-многим
+Author.hasMany(Book, {
+    as: `books`,
+    foreignKey: `authorId`
+});
+
+// Один-к-одному
+Book.belongsTo(Author, {
+    foreignKey: `authorId`,
+    as: `author`,
+});
+
+// Многие ко многим
+Book.belongsToMany(Genre, {
+    through: `book_genre`,
+    as: `genres`,
+    foreignKey: `book_id`,
+    timestamps: false,
+    paranoid: false,
+});
+
+Genre.belongsToMany(Book, {
+    through: `book_genre`,
+    as: `books`,
+    foreignKey: `genre_id`,
+});
+
+// Синхронизирует модели и заполняет БД
+// начальными данными
+const initDb = async () => {
+    await sequelize.sync({ force: true});
+    console.info(`Структура БД успешно создана.`);
+
+    await Genre.bulkCreate(genres);
+    await Author.bulkCreate(authors);
+    await Book.bulkCreate(books);
+};
+
+module.exports = {
+    db: {
+        Author,
+        Book,
+        Genre,
+        Reader
+    },
+    initDb,
+    sequelize,
+};
diff --git a/06-postgre-and-node/06-relations/init-db.js b/06-postgre-and-node/06-relations/init-db.js
new file mode 100644
index 0000000..51b764b
--- /dev/null
+++ b/06-postgre-and-node/06-relations/init-db.js
@@ -0,0 +1,10 @@
+'use strict';
+
+const { sequelize, initDb } = require(`./db`);
+
+(async() => {
+    await initDb();
+    await sequelize.close();
+})();
+
+
diff --git a/06-postgre-and-node/06-relations/mocks.js b/06-postgre-and-node/06-relations/mocks.js
new file mode 100644
index 0000000..2ef30b4
--- /dev/null
+++ b/06-postgre-and-node/06-relations/mocks.js
@@ -0,0 +1,37 @@
+'use strict';
+
+const genres = [
+    { title: `Фантастика` },
+    { title: `Ужасы` },
+    { title: `Драма` },
+    { title: `Трагедия` },
+    { title: `Комедия` },
+    { title: `Роман` },
+    { title: `IT`},
+];
+
+const authors = [
+    { firstname: `Стивен`, lastname: `Кинг`, birthDate: `1947-09-21`},
+    { firstname: `Сергей`, lastname: `Лукьяненко`, birthDate: `1968-04-11`},
+    { firstname: `Джон`, lastname: `Резиг`, birthDate: `1984-05-08`},
+];
+
+const books = [
+    { title: `Оно`, releaseDate: `1986-03-01`, pageCount: 1138, authorId: 1},
+    { title: `Сияние`, releaseDate: `1977-01-28`, pageCount: 447, authorId: 1},
+    { title: `Бессонница`, releaseDate: `1994-09-15`, pageCount: 768, authorId: 1},
+    { title: `Чужак`, releaseDate: `2018-05-22`, pageCount: 560, authorId: 1},
+    { title: `Ночной дозор`, releaseDate: `1998-01-01`, pageCount: 300, authorId: 2},
+    { title: `Лабиринт отражений`, releaseDate: `1997-03-10`, pageCount: 400, authorId: 2},
+    { title: `Черновик`, releaseDate: `2005-09-01`, pageCount: 570, authorId: 2},
+    { title: `JavaScript. Профессиональные приемы программирования`, releaseDate: `2008-01-01`, pageCount: 384, authorId: 3},
+];
+
+module.exports = {
+    genres,
+    authors,
+    books,
+}
+
+
+
diff --git a/06-postgre-and-node/06-relations/models/author.js b/06-postgre-and-node/06-relations/models/author.js
new file mode 100644
index 0000000..cd0d94c
--- /dev/null
+++ b/06-postgre-and-node/06-relations/models/author.js
@@ -0,0 +1,27 @@
+'use strict';
+
+const {Model, DataTypes} = require(`sequelize`);
+
+module.exports = (sequelize) => {
+    class Author extends Model{}
+    Author.init({
+        firstname: {
+          type: DataTypes.STRING,
+          allowNull: false,
+        },
+        lastname: {
+            type: DataTypes.STRING,
+            allowNull: false,
+        },
+        birthDate: {
+          type: DataTypes.DATE,
+          allowNull: false,
+        },
+    }, {
+        sequelize,
+        timestamps: false,
+        paranoid: false,
+    });
+
+    return Author;
+};
diff --git a/06-postgre-and-node/06-relations/models/book.js b/06-postgre-and-node/06-relations/models/book.js
new file mode 100644
index 0000000..5dc8459
--- /dev/null
+++ b/06-postgre-and-node/06-relations/models/book.js
@@ -0,0 +1,27 @@
+'use strict';
+
+const {Model, DataTypes} = require(`sequelize`);
+
+module.exports = (sequelize) => {
+    class Book extends Model{}
+    Book.init({
+        title: {
+          type: DataTypes.STRING,
+          allowNull: false,
+        },
+        releaseDate: {
+          type: DataTypes.DATE,
+          allowNull: false,
+        },
+        pageCount: {
+            type: DataTypes.INTEGER,
+            allowNull: false,
+        },
+    }, {
+        sequelize,
+        timestamps: false,
+        paranoid: false,
+    });
+
+    return Book;
+};
diff --git a/06-postgre-and-node/06-relations/models/genre.js b/06-postgre-and-node/06-relations/models/genre.js
new file mode 100644
index 0000000..9fb31b5
--- /dev/null
+++ b/06-postgre-and-node/06-relations/models/genre.js
@@ -0,0 +1,19 @@
+'use strict';
+
+const {Model, DataTypes} = require(`sequelize`);
+
+module.exports = (sequelize) => {
+    class Genre extends Model{}
+    Genre.init({
+        title: {
+          type: DataTypes.STRING,
+          allowNull: false,
+        },
+    }, {
+        sequelize,
+        timestamps: false,
+        paranoid: false,
+    });
+
+return Genre;
+};
diff --git a/06-postgre-and-node/06-relations/models/reader.js b/06-postgre-and-node/06-relations/models/reader.js
new file mode 100644
index 0000000..11a30b5
--- /dev/null
+++ b/06-postgre-and-node/06-relations/models/reader.js
@@ -0,0 +1,33 @@
+'use strict';
+
+const {Model, DataTypes} = require(`sequelize`);
+
+module.exports = (sequelize) => {
+    class Reader extends Model{}
+    Reader.init({
+        id: {
+            type: DataTypes.INTEGER,
+            autoIncrement: true,
+            primaryKey: true,
+            allowNull: false,
+        },
+        firstname: {
+          type: DataTypes.STRING,
+          allowNull: false,
+        },
+        lastname: {
+          type: DataTypes.STRING,
+          allowNull: false,
+        },
+        birthDate: {
+          type: DataTypes.DATE,
+          allowNull: false,
+        },
+    }, {
+        sequelize,
+        timestamps: true,
+        paranoid: true,
+    });
+
+    return Reader;
+};
diff --git a/06-postgre-and-node/06-relations/package-lock.json b/06-postgre-and-node/06-relations/package-lock.json
new file mode 100644
index 0000000..0176b01
--- /dev/null
+++ b/06-postgre-and-node/06-relations/package-lock.json
@@ -0,0 +1,259 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@types/node": {
+      "version": "13.13.4",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-13.13.4.tgz",
+      "integrity": "sha512-x26ur3dSXgv5AwKS0lNfbjpCakGIduWU1DU91Zz58ONRWrIKGunmZBNv4P7N+e27sJkiGDsw/3fT4AtsqQBrBA=="
+    },
+    "any-promise": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/any-promise/-/any-promise-1.3.0.tgz",
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+    },
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+      "version": "3.7.2",
+      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.7.2.tgz",
+      "integrity": "sha512-XpNj6GDQzdfW+r2Wnn7xiSAd7TM3jzkxGXBGTtWKuSXv1xUV+azxAm8jdWZN06QTQk+2N2XB9jRDkvbmQmcRtg=="
+    },
+    "buffer-writer": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/buffer-writer/-/buffer-writer-2.0.0.tgz",
+      "integrity": "sha512-a7ZpuTZU1TRtnwyCNW3I5dc0wWNC3VR9S++Ewyk2HHZdrO3CQJqSpd+95Us590V6AL7JqUAH2IwZ/398PmNFgw=="
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+      "requires": {
+        "is-bluebird": "^1.0.2",
+        "shimmer": "^1.1.0"
+      }
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+      "requires": {
+        "moment": ">= 2.9.0"
+      }
+    },
+    "ms": {
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+    },
+    "packet-reader": {
+      "version": "1.0.0",
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+      "integrity": "sha512-HAKu/fG3HpHFO0AA8WE8q2g+gBJaZ9MG7fcKk+IJPLTGAD6Psw4443l+9DGRbOIh3/aXr7Phy0TjilYivJo5XQ=="
+    },
+    "pg": {
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+      "requires": {
+        "buffer-writer": "2.0.0",
+        "packet-reader": "1.0.0",
+        "pg-connection-string": "0.1.3",
+        "pg-pool": "^3.1.1",
+        "pg-protocol": "^1.2.2",
+        "pg-types": "^2.1.0",
+        "pgpass": "1.x",
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+      }
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+        "postgres-array": "~2.0.0",
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+    },
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+        "xtend": "^4.0.0"
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+        "dottie": "^2.0.0",
+        "inflection": "1.12.0",
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+        "toposort-class": "^1.0.1",
+        "uuid": "^3.3.3",
+        "validator": "^10.11.0",
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+    },
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+      "resolved": "https://registry.npmjs.org/wkx/-/wkx-0.4.8.tgz",
+      "integrity": "sha512-ikPXMM9IR/gy/LwiOSqWlSL3X/J5uk9EO2hHNRXS41eTLXaUFEVw9fn/593jW/tE5tedNg8YjT5HkCa4FqQZyQ==",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
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+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
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+    }
+  }
+}
diff --git a/06-postgre-and-node/06-relations/package.json b/06-postgre-and-node/06-relations/package.json
new file mode 100644
index 0000000..0e0381f
--- /dev/null
+++ b/06-postgre-and-node/06-relations/package.json
@@ -0,0 +1,17 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "description": "",
+  "main": "01-connect.js",
+  "scripts": {
+    "initdb": "node ./init-db.js",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "pg": "8.0.3",
+    "sequelize": "5.21.7"
+  }
+}
diff --git a/06-postgre-and-node/07-sequelize-sql/01-raw.js b/06-postgre-and-node/07-sequelize-sql/01-raw.js
new file mode 100644
index 0000000..2d58ea8
--- /dev/null
+++ b/06-postgre-and-node/07-sequelize-sql/01-raw.js
@@ -0,0 +1,13 @@
+'use strict';
+
+const { sequelize } = require(`./db`);
+
+(async () => {
+   const sql = `SELECT * FROM "Books";`;
+
+   const type = sequelize.QueryTypes.SELECT;
+   const books = await sequelize.query(sql, {type});
+
+   sequelize.close();
+   console.log(books);
+})();
diff --git a/06-postgre-and-node/07-sequelize-sql/02-raw-and-bind.js b/06-postgre-and-node/07-sequelize-sql/02-raw-and-bind.js
new file mode 100644
index 0000000..3def320
--- /dev/null
+++ b/06-postgre-and-node/07-sequelize-sql/02-raw-and-bind.js
@@ -0,0 +1,15 @@
+'use strict';
+
+const { sequelize } = require(`./db`);
+
+(async () => {
+  const type = sequelize.QueryTypes.SELECT;
+  const sql = `SELECT * FROM "Books" WHERE "Books".title = $1;`;
+  const title = `Лабиринт отражений`;
+
+  const bind = [title];
+  const books = await sequelize.query(sql, {type, bind});
+
+  sequelize.close();
+  console.log(books);
+})();
diff --git a/06-postgre-and-node/07-sequelize-sql/03-raw-and-replacements.js b/06-postgre-and-node/07-sequelize-sql/03-raw-and-replacements.js
new file mode 100644
index 0000000..95ce9ce
--- /dev/null
+++ b/06-postgre-and-node/07-sequelize-sql/03-raw-and-replacements.js
@@ -0,0 +1,16 @@
+'use strict';
+
+const { sequelize } = require(`./db`);
+
+(async () => {
+  const sql = `SELECT * FROM "Books" WHERE "Books".title = :title`;
+  const title = `Лабиринт отражений`;
+
+  const type = sequelize.QueryTypes.SELECT;
+  const replacements = {title};
+  const books = await sequelize.query(sql, {type, replacements});
+
+  sequelize.close();
+
+  console.log(books);
+})();
diff --git a/06-postgre-and-node/07-sequelize-sql/04-raw-logging.js b/06-postgre-and-node/07-sequelize-sql/04-raw-logging.js
new file mode 100644
index 0000000..2b5385a
--- /dev/null
+++ b/06-postgre-and-node/07-sequelize-sql/04-raw-logging.js
@@ -0,0 +1,20 @@
+'use strict';
+
+const { sequelize } = require(`./db`);
+
+(async () => {
+  const sql = `SELECT * FROM "Books" WHERE "Books".title = ?`;
+  const title = `Лабиринт отражений`;
+
+  const type = sequelize.QueryTypes.SELECT;
+  const replacements = [title];
+  const books = await sequelize.query(sql, {type,
+    replacements,
+    logging: (query) => {
+      console.log(query);
+    }
+  });
+
+  sequelize.close();
+  console.log(books);
+})();
diff --git a/06-postgre-and-node/07-sequelize-sql/04-raw-replacements-array.js b/06-postgre-and-node/07-sequelize-sql/04-raw-replacements-array.js
new file mode 100644
index 0000000..8f2e7b5
--- /dev/null
+++ b/06-postgre-and-node/07-sequelize-sql/04-raw-replacements-array.js
@@ -0,0 +1,15 @@
+'use strict';
+
+const { sequelize } = require(`./db`);
+
+(async () => {
+  const sql = `SELECT * FROM "Books" WHERE "Books".title = ?`;
+  const title = `Лабиринт отражений`;
+
+  const type = sequelize.QueryTypes.SELECT;
+  const replacements = [title];
+  const peoples = await sequelize.query(sql, {type, replacements});
+
+  sequelize.close();
+  console.log(peoples);
+})();
diff --git a/06-postgre-and-node/07-sequelize-sql/db.js b/06-postgre-and-node/07-sequelize-sql/db.js
new file mode 100644
index 0000000..56ad97d
--- /dev/null
+++ b/06-postgre-and-node/07-sequelize-sql/db.js
@@ -0,0 +1,63 @@
+'use strict';
+
+const Sequelize = require(`sequelize`);
+const { genres, authors, books } = require(`./mocks`);
+
+const sequelize = new Sequelize(`library`, `academy`, `123456`, {
+    host: `localhost`,
+    dialect: `postgres`,
+});
+
+const Reader = require(`./models/reader`)(sequelize);
+const Author = require(`./models/author`)(sequelize);
+const Book = require(`./models/book`)(sequelize);
+const Genre = require(`./models/genre`)(sequelize);
+
+// Один-ко-многим
+Author.hasMany(Book, {
+    as: `books`,
+    foreignKey: `authorId`
+});
+
+// Один-к-одному
+Book.belongsTo(Author, {
+    foreignKey: `authorId`,
+    as: `author`,
+});
+
+// Многие ко многим
+Book.belongsToMany(Genre, {
+    through: `book_genre`,
+    as: `genres`,
+    foreignKey: `book_id`,
+    timestamps: false,
+    paranoid: false,
+});
+
+Genre.belongsToMany(Book, {
+    through: `book_genre`,
+    as: `books`,
+    foreignKey: `genre_id`,
+});
+
+// Синхронизирует модели и заполняет БД
+// начальными данными
+const initDb = async () => {
+    await sequelize.sync({ force: true});
+    console.info(`Структура БД успешно создана.`);
+
+    await Genre.bulkCreate(genres);
+    await Author.bulkCreate(authors);
+    await Book.bulkCreate(books);
+};
+
+module.exports = {
+    db: {
+        Author,
+        Book,
+        Genre,
+        Reader
+    },
+    initDb,
+    sequelize,
+};
diff --git a/06-postgre-and-node/07-sequelize-sql/init-db.js b/06-postgre-and-node/07-sequelize-sql/init-db.js
new file mode 100644
index 0000000..51b764b
--- /dev/null
+++ b/06-postgre-and-node/07-sequelize-sql/init-db.js
@@ -0,0 +1,10 @@
+'use strict';
+
+const { sequelize, initDb } = require(`./db`);
+
+(async() => {
+    await initDb();
+    await sequelize.close();
+})();
+
+
diff --git a/06-postgre-and-node/07-sequelize-sql/mocks.js b/06-postgre-and-node/07-sequelize-sql/mocks.js
new file mode 100644
index 0000000..2ef30b4
--- /dev/null
+++ b/06-postgre-and-node/07-sequelize-sql/mocks.js
@@ -0,0 +1,37 @@
+'use strict';
+
+const genres = [
+    { title: `Фантастика` },
+    { title: `Ужасы` },
+    { title: `Драма` },
+    { title: `Трагедия` },
+    { title: `Комедия` },
+    { title: `Роман` },
+    { title: `IT`},
+];
+
+const authors = [
+    { firstname: `Стивен`, lastname: `Кинг`, birthDate: `1947-09-21`},
+    { firstname: `Сергей`, lastname: `Лукьяненко`, birthDate: `1968-04-11`},
+    { firstname: `Джон`, lastname: `Резиг`, birthDate: `1984-05-08`},
+];
+
+const books = [
+    { title: `Оно`, releaseDate: `1986-03-01`, pageCount: 1138, authorId: 1},
+    { title: `Сияние`, releaseDate: `1977-01-28`, pageCount: 447, authorId: 1},
+    { title: `Бессонница`, releaseDate: `1994-09-15`, pageCount: 768, authorId: 1},
+    { title: `Чужак`, releaseDate: `2018-05-22`, pageCount: 560, authorId: 1},
+    { title: `Ночной дозор`, releaseDate: `1998-01-01`, pageCount: 300, authorId: 2},
+    { title: `Лабиринт отражений`, releaseDate: `1997-03-10`, pageCount: 400, authorId: 2},
+    { title: `Черновик`, releaseDate: `2005-09-01`, pageCount: 570, authorId: 2},
+    { title: `JavaScript. Профессиональные приемы программирования`, releaseDate: `2008-01-01`, pageCount: 384, authorId: 3},
+];
+
+module.exports = {
+    genres,
+    authors,
+    books,
+}
+
+
+
diff --git a/06-postgre-and-node/07-sequelize-sql/models/author.js b/06-postgre-and-node/07-sequelize-sql/models/author.js
new file mode 100644
index 0000000..cd0d94c
--- /dev/null
+++ b/06-postgre-and-node/07-sequelize-sql/models/author.js
@@ -0,0 +1,27 @@
+'use strict';
+
+const {Model, DataTypes} = require(`sequelize`);
+
+module.exports = (sequelize) => {
+    class Author extends Model{}
+    Author.init({
+        firstname: {
+          type: DataTypes.STRING,
+          allowNull: false,
+        },
+        lastname: {
+            type: DataTypes.STRING,
+            allowNull: false,
+        },
+        birthDate: {
+          type: DataTypes.DATE,
+          allowNull: false,
+        },
+    }, {
+        sequelize,
+        timestamps: false,
+        paranoid: false,
+    });
+
+    return Author;
+};
diff --git a/06-postgre-and-node/07-sequelize-sql/models/book.js b/06-postgre-and-node/07-sequelize-sql/models/book.js
new file mode 100644
index 0000000..5dc8459
--- /dev/null
+++ b/06-postgre-and-node/07-sequelize-sql/models/book.js
@@ -0,0 +1,27 @@
+'use strict';
+
+const {Model, DataTypes} = require(`sequelize`);
+
+module.exports = (sequelize) => {
+    class Book extends Model{}
+    Book.init({
+        title: {
+          type: DataTypes.STRING,
+          allowNull: false,
+        },
+        releaseDate: {
+          type: DataTypes.DATE,
+          allowNull: false,
+        },
+        pageCount: {
+            type: DataTypes.INTEGER,
+            allowNull: false,
+        },
+    }, {
+        sequelize,
+        timestamps: false,
+        paranoid: false,
+    });
+
+    return Book;
+};
diff --git a/06-postgre-and-node/07-sequelize-sql/models/genre.js b/06-postgre-and-node/07-sequelize-sql/models/genre.js
new file mode 100644
index 0000000..9fb31b5
--- /dev/null
+++ b/06-postgre-and-node/07-sequelize-sql/models/genre.js
@@ -0,0 +1,19 @@
+'use strict';
+
+const {Model, DataTypes} = require(`sequelize`);
+
+module.exports = (sequelize) => {
+    class Genre extends Model{}
+    Genre.init({
+        title: {
+          type: DataTypes.STRING,
+          allowNull: false,
+        },
+    }, {
+        sequelize,
+        timestamps: false,
+        paranoid: false,
+    });
+
+return Genre;
+};
diff --git a/06-postgre-and-node/07-sequelize-sql/models/reader.js b/06-postgre-and-node/07-sequelize-sql/models/reader.js
new file mode 100644
index 0000000..11a30b5
--- /dev/null
+++ b/06-postgre-and-node/07-sequelize-sql/models/reader.js
@@ -0,0 +1,33 @@
+'use strict';
+
+const {Model, DataTypes} = require(`sequelize`);
+
+module.exports = (sequelize) => {
+    class Reader extends Model{}
+    Reader.init({
+        id: {
+            type: DataTypes.INTEGER,
+            autoIncrement: true,
+            primaryKey: true,
+            allowNull: false,
+        },
+        firstname: {
+          type: DataTypes.STRING,
+          allowNull: false,
+        },
+        lastname: {
+          type: DataTypes.STRING,
+          allowNull: false,
+        },
+        birthDate: {
+          type: DataTypes.DATE,
+          allowNull: false,
+        },
+    }, {
+        sequelize,
+        timestamps: true,
+        paranoid: true,
+    });
+
+    return Reader;
+};
diff --git a/06-postgre-and-node/07-sequelize-sql/package-lock.json b/06-postgre-and-node/07-sequelize-sql/package-lock.json
new file mode 100644
index 0000000..0176b01
--- /dev/null
+++ b/06-postgre-and-node/07-sequelize-sql/package-lock.json
@@ -0,0 +1,259 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@types/node": {
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+        }
+      }
+    },
+    "sequelize-pool": {
+      "version": "2.3.0",
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+    },
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+      "requires": {
+        "through": "2"
+      }
+    },
+    "through": {
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+      "requires": {
+        "@types/node": "*"
+      }
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+      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
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+}
diff --git a/06-postgre-and-node/07-sequelize-sql/package.json b/06-postgre-and-node/07-sequelize-sql/package.json
new file mode 100644
index 0000000..720f845
--- /dev/null
+++ b/06-postgre-and-node/07-sequelize-sql/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "description": "",
+  "main": "01-raw.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "pg": "8.0.3",
+    "sequelize": "5.21.7"
+  }
+}
diff --git a/06-postgre-and-node/08-hooks/db.js b/06-postgre-and-node/08-hooks/db.js
new file mode 100644
index 0000000..56ad97d
--- /dev/null
+++ b/06-postgre-and-node/08-hooks/db.js
@@ -0,0 +1,63 @@
+'use strict';
+
+const Sequelize = require(`sequelize`);
+const { genres, authors, books } = require(`./mocks`);
+
+const sequelize = new Sequelize(`library`, `academy`, `123456`, {
+    host: `localhost`,
+    dialect: `postgres`,
+});
+
+const Reader = require(`./models/reader`)(sequelize);
+const Author = require(`./models/author`)(sequelize);
+const Book = require(`./models/book`)(sequelize);
+const Genre = require(`./models/genre`)(sequelize);
+
+// Один-ко-многим
+Author.hasMany(Book, {
+    as: `books`,
+    foreignKey: `authorId`
+});
+
+// Один-к-одному
+Book.belongsTo(Author, {
+    foreignKey: `authorId`,
+    as: `author`,
+});
+
+// Многие ко многим
+Book.belongsToMany(Genre, {
+    through: `book_genre`,
+    as: `genres`,
+    foreignKey: `book_id`,
+    timestamps: false,
+    paranoid: false,
+});
+
+Genre.belongsToMany(Book, {
+    through: `book_genre`,
+    as: `books`,
+    foreignKey: `genre_id`,
+});
+
+// Синхронизирует модели и заполняет БД
+// начальными данными
+const initDb = async () => {
+    await sequelize.sync({ force: true});
+    console.info(`Структура БД успешно создана.`);
+
+    await Genre.bulkCreate(genres);
+    await Author.bulkCreate(authors);
+    await Book.bulkCreate(books);
+};
+
+module.exports = {
+    db: {
+        Author,
+        Book,
+        Genre,
+        Reader
+    },
+    initDb,
+    sequelize,
+};
diff --git a/06-postgre-and-node/08-hooks/hook.js b/06-postgre-and-node/08-hooks/hook.js
new file mode 100644
index 0000000..b234a57
--- /dev/null
+++ b/06-postgre-and-node/08-hooks/hook.js
@@ -0,0 +1,8 @@
+'use strict';
+
+const { db, sequelize, initDb } = require(`./db`);
+
+(async() => {
+    await db.Author.create({ firstname: `Марио`, lastname: `Пьюзо`});
+    await sequelize.close();
+})();
diff --git a/06-postgre-and-node/08-hooks/init-db.js b/06-postgre-and-node/08-hooks/init-db.js
new file mode 100644
index 0000000..51b764b
--- /dev/null
+++ b/06-postgre-and-node/08-hooks/init-db.js
@@ -0,0 +1,10 @@
+'use strict';
+
+const { sequelize, initDb } = require(`./db`);
+
+(async() => {
+    await initDb();
+    await sequelize.close();
+})();
+
+
diff --git a/06-postgre-and-node/08-hooks/mocks.js b/06-postgre-and-node/08-hooks/mocks.js
new file mode 100644
index 0000000..2ef30b4
--- /dev/null
+++ b/06-postgre-and-node/08-hooks/mocks.js
@@ -0,0 +1,37 @@
+'use strict';
+
+const genres = [
+    { title: `Фантастика` },
+    { title: `Ужасы` },
+    { title: `Драма` },
+    { title: `Трагедия` },
+    { title: `Комедия` },
+    { title: `Роман` },
+    { title: `IT`},
+];
+
+const authors = [
+    { firstname: `Стивен`, lastname: `Кинг`, birthDate: `1947-09-21`},
+    { firstname: `Сергей`, lastname: `Лукьяненко`, birthDate: `1968-04-11`},
+    { firstname: `Джон`, lastname: `Резиг`, birthDate: `1984-05-08`},
+];
+
+const books = [
+    { title: `Оно`, releaseDate: `1986-03-01`, pageCount: 1138, authorId: 1},
+    { title: `Сияние`, releaseDate: `1977-01-28`, pageCount: 447, authorId: 1},
+    { title: `Бессонница`, releaseDate: `1994-09-15`, pageCount: 768, authorId: 1},
+    { title: `Чужак`, releaseDate: `2018-05-22`, pageCount: 560, authorId: 1},
+    { title: `Ночной дозор`, releaseDate: `1998-01-01`, pageCount: 300, authorId: 2},
+    { title: `Лабиринт отражений`, releaseDate: `1997-03-10`, pageCount: 400, authorId: 2},
+    { title: `Черновик`, releaseDate: `2005-09-01`, pageCount: 570, authorId: 2},
+    { title: `JavaScript. Профессиональные приемы программирования`, releaseDate: `2008-01-01`, pageCount: 384, authorId: 3},
+];
+
+module.exports = {
+    genres,
+    authors,
+    books,
+}
+
+
+
diff --git a/06-postgre-and-node/08-hooks/models/author.js b/06-postgre-and-node/08-hooks/models/author.js
new file mode 100644
index 0000000..2563c5c
--- /dev/null
+++ b/06-postgre-and-node/08-hooks/models/author.js
@@ -0,0 +1,37 @@
+'use strict';
+
+const {Model, DataTypes} = require(`sequelize`);
+
+module.exports = (sequelize) => {
+    class Author extends Model{}
+    Author.init({
+        firstname: {
+          type: DataTypes.STRING,
+          allowNull: false,
+        },
+        lastname: {
+            type: DataTypes.STRING,
+            allowNull: false,
+        },
+        birthDate: {
+          type: DataTypes.DATE,
+          allowNull: false,
+        },
+    }, {
+        sequelize,
+        timestamps: false,
+        paranoid: false,
+        hooks: {
+            beforeValidate: (author, options) => {
+                if (! author.birthDate) {
+                    author.birthDate = new Date(`1990-02-01`);
+                }
+            },
+            beforeCreate: (author, options) => {
+                console.log(`Новый автор: ${author.lastname} ${author.birthDate}`);
+            }
+        }
+    });
+
+    return Author;
+};
diff --git a/06-postgre-and-node/08-hooks/models/book.js b/06-postgre-and-node/08-hooks/models/book.js
new file mode 100644
index 0000000..5dc8459
--- /dev/null
+++ b/06-postgre-and-node/08-hooks/models/book.js
@@ -0,0 +1,27 @@
+'use strict';
+
+const {Model, DataTypes} = require(`sequelize`);
+
+module.exports = (sequelize) => {
+    class Book extends Model{}
+    Book.init({
+        title: {
+          type: DataTypes.STRING,
+          allowNull: false,
+        },
+        releaseDate: {
+          type: DataTypes.DATE,
+          allowNull: false,
+        },
+        pageCount: {
+            type: DataTypes.INTEGER,
+            allowNull: false,
+        },
+    }, {
+        sequelize,
+        timestamps: false,
+        paranoid: false,
+    });
+
+    return Book;
+};
diff --git a/06-postgre-and-node/08-hooks/models/genre.js b/06-postgre-and-node/08-hooks/models/genre.js
new file mode 100644
index 0000000..9fb31b5
--- /dev/null
+++ b/06-postgre-and-node/08-hooks/models/genre.js
@@ -0,0 +1,19 @@
+'use strict';
+
+const {Model, DataTypes} = require(`sequelize`);
+
+module.exports = (sequelize) => {
+    class Genre extends Model{}
+    Genre.init({
+        title: {
+          type: DataTypes.STRING,
+          allowNull: false,
+        },
+    }, {
+        sequelize,
+        timestamps: false,
+        paranoid: false,
+    });
+
+return Genre;
+};
diff --git a/06-postgre-and-node/08-hooks/models/reader.js b/06-postgre-and-node/08-hooks/models/reader.js
new file mode 100644
index 0000000..11a30b5
--- /dev/null
+++ b/06-postgre-and-node/08-hooks/models/reader.js
@@ -0,0 +1,33 @@
+'use strict';
+
+const {Model, DataTypes} = require(`sequelize`);
+
+module.exports = (sequelize) => {
+    class Reader extends Model{}
+    Reader.init({
+        id: {
+            type: DataTypes.INTEGER,
+            autoIncrement: true,
+            primaryKey: true,
+            allowNull: false,
+        },
+        firstname: {
+          type: DataTypes.STRING,
+          allowNull: false,
+        },
+        lastname: {
+          type: DataTypes.STRING,
+          allowNull: false,
+        },
+        birthDate: {
+          type: DataTypes.DATE,
+          allowNull: false,
+        },
+    }, {
+        sequelize,
+        timestamps: true,
+        paranoid: true,
+    });
+
+    return Reader;
+};
diff --git a/06-postgre-and-node/08-hooks/package-lock.json b/06-postgre-and-node/08-hooks/package-lock.json
new file mode 100644
index 0000000..0176b01
--- /dev/null
+++ b/06-postgre-and-node/08-hooks/package-lock.json
@@ -0,0 +1,259 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@types/node": {
+      "version": "13.13.4",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-13.13.4.tgz",
+      "integrity": "sha512-x26ur3dSXgv5AwKS0lNfbjpCakGIduWU1DU91Zz58ONRWrIKGunmZBNv4P7N+e27sJkiGDsw/3fT4AtsqQBrBA=="
+    },
+    "any-promise": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/any-promise/-/any-promise-1.3.0.tgz",
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+      "integrity": "sha512-XpNj6GDQzdfW+r2Wnn7xiSAd7TM3jzkxGXBGTtWKuSXv1xUV+azxAm8jdWZN06QTQk+2N2XB9jRDkvbmQmcRtg=="
+    },
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+      "integrity": "sha1-N+8eCAqP+1XC9BZPU28ZGeeWiu4=",
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diff --git a/06-postgre-and-node/08-hooks/package.json b/06-postgre-and-node/08-hooks/package.json
new file mode 100644
index 0000000..0e0381f
--- /dev/null
+++ b/06-postgre-and-node/08-hooks/package.json
@@ -0,0 +1,17 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "description": "",
+  "main": "01-connect.js",
+  "scripts": {
+    "initdb": "node ./init-db.js",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "pg": "8.0.3",
+    "sequelize": "5.21.7"
+  }
+}
diff --git a/06-postgre-and-node/09-sql-injection/01-sql-injection.js b/06-postgre-and-node/09-sql-injection/01-sql-injection.js
new file mode 100644
index 0000000..c21c786
--- /dev/null
+++ b/06-postgre-and-node/09-sql-injection/01-sql-injection.js
@@ -0,0 +1,28 @@
+'use strict';
+
+const {Client} = require(`pg`);
+const express = require(`express`);
+
+const app = express();
+const port = 4000;
+
+const connectionString = `postgres://academy:123456@localhost/library`;
+const client = new Client(connectionString);
+
+app.get(`/:bookId`, async (req, res) => {
+    const {bookId} = req.params;
+    const sql = `SELECT * FROM "Books" WHERE "Books".id = '${bookId}'`;
+    console.log(sql);
+
+    try {
+        const { rows } = await client.query(sql);
+        res.send(rows);
+    } catch {
+        res.send(`Not found`);
+    }
+});
+
+(async () => {
+    await client.connect();
+    app.listen(port);
+})();
diff --git a/06-postgre-and-node/09-sql-injection/package-lock.json b/06-postgre-and-node/09-sql-injection/package-lock.json
new file mode 100644
index 0000000..ac7d1e4
--- /dev/null
+++ b/06-postgre-and-node/09-sql-injection/package-lock.json
@@ -0,0 +1,485 @@
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+        "debug": "2.6.9",
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+        "http-errors": "1.7.2",
+        "iconv-lite": "0.4.24",
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+        "raw-body": "2.4.0",
+        "type-is": "~1.6.17"
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+}
diff --git a/06-postgre-and-node/09-sql-injection/package.json b/06-postgre-and-node/09-sql-injection/package.json
new file mode 100644
index 0000000..ceb7391
--- /dev/null
+++ b/06-postgre-and-node/09-sql-injection/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "description": "",
+  "main": "01-connect.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "4.17.1",
+    "pg": "8.0.2"
+  }
+}
diff --git a/07-authentication/03-session/01-session.js b/07-authentication/03-session/01-session.js
new file mode 100644
index 0000000..ccb6371
--- /dev/null
+++ b/07-authentication/03-session/01-session.js
@@ -0,0 +1,30 @@
+'use strict';
+
+const express = require(`express`);
+const expressSession = require(`express-session`);
+
+const SECRET_SESSION = `J@2(D#8e33d)`;
+const PORT = 4000;
+
+const app = express();
+app.use(expressSession({
+    secret: SECRET_SESSION,
+    resave: false,
+    saveUninitialized: false,
+    name: `session_id`
+}));
+
+app.listen(PORT);
+
+app.get(`/`, (req, res) => {
+    let {counter = 0} = req.session;
+    counter++;
+
+    const welcomeText = `Это ваш первый визит на наш сайт.`;
+    const text = `Вы посетили наш сайт уже ${counter} раз`;
+
+    const message = counter === 1 ? welcomeText : text;
+    req.session.counter = counter;
+
+    res.send(message);
+});
diff --git a/07-authentication/03-session/package-lock.json b/07-authentication/03-session/package-lock.json
new file mode 100644
index 0000000..29595a8
--- /dev/null
+++ b/07-authentication/03-session/package-lock.json
@@ -0,0 +1,419 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
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+      "version": "1.3.7",
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+      "requires": {
+        "mime-types": "~2.1.24",
+        "negotiator": "0.6.2"
+      }
+    },
+    "array-flatten": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
+      "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
+    },
+    "body-parser": {
+      "version": "1.19.0",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.19.0.tgz",
+      "integrity": "sha512-dhEPs72UPbDnAQJ9ZKMNTP6ptJaionhP5cBb541nXPlW60Jepo9RV/a4fX4XWW9CuFNK22krhrj1+rgzifNCsw==",
+      "requires": {
+        "bytes": "3.1.0",
+        "content-type": "~1.0.4",
+        "debug": "2.6.9",
+        "depd": "~1.1.2",
+        "http-errors": "1.7.2",
+        "iconv-lite": "0.4.24",
+        "on-finished": "~2.3.0",
+        "qs": "6.7.0",
+        "raw-body": "2.4.0",
+        "type-is": "~1.6.17"
+      }
+    },
+    "bytes": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.0.tgz",
+      "integrity": "sha512-zauLjrfCG+xvoyaqLoV8bLVXXNGC4JqlxFCutSDWA6fJrTo2ZuvLYTqZ7aHBLZSMOopbzwv8f+wZcVzfVTI2Dg=="
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+      "version": "0.5.3",
+      "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.3.tgz",
+      "integrity": "sha512-ExO0774ikEObIAEV9kDo50o+79VCUdEB6n6lzKgGwupcVeRlhrj3qGAfwq8G6uBJjkqLrhT0qEYFcWng8z1z0g==",
+      "requires": {
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+      }
+    },
+    "content-type": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/content-type/-/content-type-1.0.4.tgz",
+      "integrity": "sha512-hIP3EEPs8tB9AT1L+NUqtwOAps4mk2Zob89MWXMHjHWg9milF/j4osnnQLXBCBFBk/tvIG/tUc9mOUJiPBhPXA=="
+    },
+    "cookie": {
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+      "integrity": "sha512-+Hp8fLp57wnUSt0tY0tHEXh4voZRDnoIrZPqlo3DPiI4y9lwg/jqx+1Om94/W6ZaPDOUbnjOt/99w66zk+l1Xg=="
+    },
+    "cookie-signature": {
+      "version": "1.0.6",
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+      "integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw="
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+      "requires": {
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+      }
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+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/depd/-/depd-1.1.2.tgz",
+      "integrity": "sha1-m81S4UwJd2PnSbJ0xDRu0uVgtak="
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+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/destroy/-/destroy-1.0.4.tgz",
+      "integrity": "sha1-l4hXRCxEdJ5CBmE+N5RiBYJqvYA="
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+      "version": "1.1.1",
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+    },
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+      "integrity": "sha1-rT/0yG7C0CkyL1oCw6mmBslbP1k="
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+      "integrity": "sha1-Aljq5NPQwJdN4cFpGI7wBR0dGYg="
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+      "version": "1.8.1",
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+      "integrity": "sha1-Qa4u62XvpiJorr/qg6x9eSmbCIc="
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+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
+      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
+    },
+    "vary": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
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+}
diff --git a/07-authentication/03-session/package.json b/07-authentication/03-session/package.json
new file mode 100644
index 0000000..6856d68
--- /dev/null
+++ b/07-authentication/03-session/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "4.17.1",
+    "express-session": "1.17.1"
+  }
+}
diff --git a/07-authentication/05-xss-and-csrf/01-xss-intro.html b/07-authentication/05-xss-and-csrf/01-xss-intro.html
new file mode 100644
index 0000000..6a5d997
--- /dev/null
+++ b/07-authentication/05-xss-and-csrf/01-xss-intro.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<html lang="ru">
+<head>
+  <title>Демонстрация XSS</title>
+  <meta charset="UTF-8" />
+</head>
+<body>
+  <form id="basic-form">
+    <input id="user-name" type="text">
+    <input type="submit" value="Отправить" placeholder="Пожалуйста, представьтесь">
+    <p id="welcome-user"></p>
+  </form>
+  <script>
+    'use strict';
+
+    const submitFormHandler = (evt) => {
+      evt.preventDefault();
+      welcomeUserElement.innerHTML = `Привет, ${userNameElement.value}!`;
+    }
+
+    const formElement = document.querySelector(`#basic-form`);
+    const welcomeUserElement = formElement.querySelector(`#welcome-user`);
+    const userNameElement = formElement.querySelector(`#user-name`);
+
+    formElement.addEventListener(`submit`, submitFormHandler);
+  </script>
+</body>
+
+</html>
diff --git a/07-authentication/05-xss-and-csrf/02-helmet.js b/07-authentication/05-xss-and-csrf/02-helmet.js
new file mode 100644
index 0000000..266471c
--- /dev/null
+++ b/07-authentication/05-xss-and-csrf/02-helmet.js
@@ -0,0 +1,17 @@
+'use strict';
+
+const express = require('express');
+const helmet = require('helmet');
+
+const app = express();
+
+app.use(helmet({
+
+    // Конфигурация отдельных middleware
+	contentSecurityPolicy: {
+        directives: {
+            scriptSrc: ["'self'"]
+        }
+    },
+    xssFilter: true,
+}));
diff --git a/07-authentication/05-xss-and-csrf/03-express-validator.js b/07-authentication/05-xss-and-csrf/03-express-validator.js
new file mode 100644
index 0000000..9e7beae
--- /dev/null
+++ b/07-authentication/05-xss-and-csrf/03-express-validator.js
@@ -0,0 +1,17 @@
+'use strict';
+
+const express = require('express');
+const { body } = require('express-validator');
+
+const app = express();
+app.use(express.json());
+
+app.post(`/comment`, [
+  body(`text`)
+    .not().isEmpty()
+    .trim()
+    .escape(),
+  body(`notifyOnReply`).toBoolean()
+], (req, res) => {
+  // Обработка запроса
+});
diff --git a/07-authentication/06-session-and-db/01-session-and-postgres.js b/07-authentication/06-session-and-db/01-session-and-postgres.js
new file mode 100644
index 0000000..8fd97dc
--- /dev/null
+++ b/07-authentication/06-session-and-db/01-session-and-postgres.js
@@ -0,0 +1,53 @@
+'use strict';
+
+const express = require(`express`);
+const Sequelize = require(`sequelize`);
+const session = require(`express-session`);
+const SequelizeStore = require(`connect-session-sequelize`)(session.Store);
+const app = express();
+
+const sequelize = new Sequelize(`library`, `academy`, `123456`, {
+    dialect: `postgres`,
+    host: `localhost`,
+});
+
+const mySessionStore = new SequelizeStore({
+    db: sequelize,
+    expiration: 180000,
+    checkExpirationInterval: 60000,
+});
+
+
+app.use(session({
+    secret: `racoons`,
+    store: mySessionStore,
+    resave: false,
+    proxy: true,
+    saveUninitialized: false,
+}));
+
+const PORT = 4000;
+app.listen(PORT);
+
+app.get(`/`, (req, res) => {
+    let {counter = 0} = req.session;
+    counter++;
+
+    const welcomeText = `Это ваш первый визит на наш сайт.`;
+    const text = `Вы посетили наш сайт уже ${counter} раз`;
+
+    const message = counter === 1 ? welcomeText : text;
+    req.session.counter = counter;
+
+    res.send(message);
+});
+
+(async () => {
+    await sequelize.sync({ force: false });
+})();
+
+
+
+
+
+
diff --git a/07-authentication/06-session-and-db/package-lock.json b/07-authentication/06-session-and-db/package-lock.json
new file mode 100644
index 0000000..c38e41d
--- /dev/null
+++ b/07-authentication/06-session-and-db/package-lock.json
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+    },
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+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/toposort-class/-/toposort-class-1.0.1.tgz",
+      "integrity": "sha1-f/0feMi+KMO6Rc1OGj9e4ZO9mYg="
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+    "type-is": {
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+      "requires": {
+        "media-typer": "0.3.0",
+        "mime-types": "~2.1.24"
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+      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
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+    "validator": {
+      "version": "10.11.0",
+      "resolved": "https://registry.npmjs.org/validator/-/validator-10.11.0.tgz",
+      "integrity": "sha512-X/p3UZerAIsbBfN/IwahhYaBbY68EN/UQBWHtsbXGT5bfrH/p4NQzUCG1kF/rtKaNpnJ7jAu6NGTdSNtyNIXMw=="
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+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
+      "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
+    },
+    "wkx": {
+      "version": "0.4.8",
+      "resolved": "https://registry.npmjs.org/wkx/-/wkx-0.4.8.tgz",
+      "integrity": "sha512-ikPXMM9IR/gy/LwiOSqWlSL3X/J5uk9EO2hHNRXS41eTLXaUFEVw9fn/593jW/tE5tedNg8YjT5HkCa4FqQZyQ==",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
+    "xtend": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
+      "integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ=="
+    }
+  }
+}
diff --git a/07-authentication/06-session-and-db/package.json b/07-authentication/06-session-and-db/package.json
new file mode 100644
index 0000000..e56260b
--- /dev/null
+++ b/07-authentication/06-session-and-db/package.json
@@ -0,0 +1,11 @@
+{
+  "name": "session-in-postgresql",
+  "version": "1.0.0",
+  "dependencies": {
+    "connect-session-sequelize": "6.1.1",
+    "express": "4.17.1",
+    "express-session": "1.17.1",
+    "pg": "8.2.1",
+    "sequelize": "5.21.11"
+  }
+}
diff --git a/07-authentication/07-joi/01-joi.js b/07-authentication/07-joi/01-joi.js
new file mode 100644
index 0000000..f4e297e
--- /dev/null
+++ b/07-authentication/07-joi/01-joi.js
@@ -0,0 +1,75 @@
+'use strict';
+
+const Joi = require(`joi`);
+
+(async () => {
+    const bookSchema = Joi.object({
+        title: Joi.string()
+            .min(2)
+            .max(150)
+            .required(),
+        releaseDate: Joi.string()
+            .isoDate()
+            .required(),
+        pageCount: Joi.number()
+            .min(100)
+            .max(4000)
+            .required(),
+        author: Joi.object({
+            firstname: Joi.string()
+                .min(3)
+                .max(50)
+                .required(),
+            lastname: Joi.string()
+                .min(3)
+                .max(50)
+                .required(),
+            birthDate: Joi.string()
+                .isoDate()
+                .required(),
+            email: Joi.string()
+                .email()
+                .required(),
+        }).required(),
+
+        price: Joi.number()
+            .min(100)
+            .max(1000)
+            .required(),
+
+        genres: Joi.array()
+            .items(Joi.string())
+            .min(1)
+            .required(),
+
+        coverType: Joi.string()
+            .valid(`soft`, `hard`)
+            .required(),
+    });
+
+    const mock = {
+        "title": "Оно",
+        "releaseDate": "1984-01-01",
+        "pageCount": 1143,
+        "author": {
+            "firstname": "Стивен",
+            "lastname": "Кинг",
+            "birthDate": "1947-09-21",
+            "email": "king@king.com"
+        },
+        "price": "100",
+        "genres": ["drama", "horror"],
+        "coverType": "hard"
+    };
+
+    try {
+        const status = await bookSchema.validateAsync(mock, { abortEarly: false });
+        console.log(status);
+    } catch (err) {
+        console.error(err);
+    }
+
+})();
+
+
+
diff --git a/07-authentication/07-joi/02-joi-and-express.http b/07-authentication/07-joi/02-joi-and-express.http
new file mode 100644
index 0000000..2c851d5
--- /dev/null
+++ b/07-authentication/07-joi/02-joi-and-express.http
@@ -0,0 +1,42 @@
+# Валидные данные
+POST http://localhost:3000/book HTTP/1.1
+Content-Type: application/json
+
+{
+  "title": "Оно",
+  "releaseDate": "1984-01-01",
+  "pageCount": 1143,
+  "author": {
+      "firstname": "Стивен",
+      "lastname": "Кинг",
+      "birthDate": "1947-09-21",
+      "email": "king@king.com"
+  },
+  "price": "100",
+  "genres": ["drama", "horror"],
+  "coverType": "hard"
+}
+
+###
+
+# Допущены ошибки:
+# - неправильный формат даты;
+# - отсутствует поле `pageCount`;
+# - в `price` некорректное значение
+POST http://localhost:3000/book HTTP/1.1
+Content-Type: application/json
+
+{
+  "title": "Оно",
+  "releaseDate": "01.01.1984",
+  "author": {
+      "firstname": "Стивен",
+      "lastname": "Кинг",
+      "birthDate": "1947-09-21",
+      "email": "king@king.com"
+  },
+  "price": "a lot of",
+  "genres": ["drama", "horror"],
+  "coverType": "hard"
+}
+
diff --git a/07-authentication/07-joi/02-joi-and-express.js b/07-authentication/07-joi/02-joi-and-express.js
new file mode 100644
index 0000000..aac4b34
--- /dev/null
+++ b/07-authentication/07-joi/02-joi-and-express.js
@@ -0,0 +1,77 @@
+'use strict';
+
+const express = require(`express`);
+const Joi = require(`joi`);
+
+const HTTP_CODE_BAD_REQUEST = 400;
+
+const app = express();
+app.use(express.json());
+
+const port = 3000;
+
+app.post(`/book`, async (req, res) => {
+    const bookSchema = Joi.object({
+        title: Joi.string()
+            .min(2)
+            .max(150)
+            .required(),
+        releaseDate: Joi.string()
+            .isoDate()
+            .required(),
+        pageCount: Joi.number()
+            .min(100)
+            .max(4000)
+            .required(),
+        author: Joi.object({
+            firstname: Joi.string()
+                .min(3)
+                .max(50)
+                .required(),
+            lastname: Joi.string()
+                .min(3)
+                .max(50)
+                .required(),
+            birthDate: Joi.string()
+                .isoDate()
+                .required(),
+            email: Joi.string()
+                .email()
+                .required(),
+        }).required(),
+
+        price: Joi.number()
+            .min(100)
+            .max(1000)
+            .required(),
+
+        genres: Joi.array()
+            .items(Joi.string())
+            .min(1)
+            .required(),
+
+        coverType: Joi.string()
+            .valid(`soft`, `hard`)
+            .required(),
+    });
+
+    const { body } = req;
+
+    try {
+       await bookSchema.validateAsync(body, { abortEarly: false });
+    } catch(err) {
+        const { details } = err;
+        res.status(HTTP_CODE_BAD_REQUEST).json({
+            message: details.map((errorDescription) => errorDescription.message),
+            data: body
+        });
+        return;
+    }
+
+    res.json({
+        message: `A new book created.`,
+        data: body
+    });
+});
+
+app.listen(port);
diff --git a/07-authentication/07-joi/03-joi-and-middlewares/app.js b/07-authentication/07-joi/03-joi-and-middlewares/app.js
new file mode 100644
index 0000000..459aa4f
--- /dev/null
+++ b/07-authentication/07-joi/03-joi-and-middlewares/app.js
@@ -0,0 +1,20 @@
+'use strict';
+
+const express = require(`express`);
+const bookValidatorMiddleware = require(`./book-validator-middleware`);
+const bookSchema = require(`./book-schema`);
+
+const app = express();
+app.use(express.json());
+
+const port = 3000;
+
+app.post(`/book`, bookValidatorMiddleware(bookSchema), async (req, res) => {
+    const { body } = req;
+    res.json({
+        message: `A new book created.`,
+        data: body
+    });
+});
+
+app.listen(port);
diff --git a/07-authentication/07-joi/03-joi-and-middlewares/book-schema.js b/07-authentication/07-joi/03-joi-and-middlewares/book-schema.js
new file mode 100644
index 0000000..b726a07
--- /dev/null
+++ b/07-authentication/07-joi/03-joi-and-middlewares/book-schema.js
@@ -0,0 +1,53 @@
+'use strict';
+
+const Joi = require(`joi`);
+
+module.exports = Joi.object({
+    title: Joi.string()
+        .min(2)
+        .max(150)
+        .required(),
+
+    releaseDate: Joi.string()
+        .isoDate()
+        .required(),
+
+    pageCount: Joi.number()
+        .min(100)
+        .max(4000)
+        .required(),
+
+    author: Joi.object({
+        firstname: Joi.string()
+            .min(3)
+            .max(50)
+            .required(),
+
+        lastname: Joi.string()
+            .min(3)
+            .max(50)
+            .required(),
+
+        birthDate: Joi.string()
+            .isoDate()
+            .required(),
+
+        email: Joi.string()
+            .email()
+            .required(),
+    }).required(),
+
+    price: Joi.number()
+        .min(100)
+        .max(1000)
+        .required(),
+
+    genres: Joi.array()
+        .items(Joi.string())
+        .min(1)
+        .required(),
+
+    coverType: Joi.string()
+        .valid(`soft`, `hard`)
+        .required(),
+});
diff --git a/07-authentication/07-joi/03-joi-and-middlewares/book-validator-middleware.js b/07-authentication/07-joi/03-joi-and-middlewares/book-validator-middleware.js
new file mode 100644
index 0000000..5aa7613
--- /dev/null
+++ b/07-authentication/07-joi/03-joi-and-middlewares/book-validator-middleware.js
@@ -0,0 +1,22 @@
+'use strict';
+
+const HTTP_CODE_BAD_REQUEST = 400;
+
+module.exports = (schema) => (
+    async (req, res, next) => {
+        const { body } = req;
+
+        try {
+            await schema.validateAsync(body, { abortEarly: false });
+         } catch(err) {
+             const { details } = err;
+             res.status(HTTP_CODE_BAD_REQUEST).json({
+                 message: details.map((errorDescription) => errorDescription.message),
+                 data: body
+             });
+             return;
+         }
+
+         next();
+    }
+);
diff --git a/07-authentication/07-joi/package-lock.json b/07-authentication/07-joi/package-lock.json
new file mode 100644
index 0000000..1d6ffaa
--- /dev/null
+++ b/07-authentication/07-joi/package-lock.json
@@ -0,0 +1,417 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@hapi/hoek": {
+      "version": "9.1.0",
+      "resolved": "https://registry.npmjs.org/@hapi/hoek/-/hoek-9.1.0.tgz",
+      "integrity": "sha512-i9YbZPN3QgfighY/1X1Pu118VUz2Fmmhd6b2n0/O8YVgGGfw0FbUYoA97k7FkpGJ+pLCFEDLUmAPPV4D1kpeFw=="
+    },
+    "@hapi/topo": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/@hapi/topo/-/topo-5.0.0.tgz",
+      "integrity": "sha512-tFJlT47db0kMqVm3H4nQYgn6Pwg10GTZHb1pwmSiv1K4ks6drQOtfEF5ZnPjkvC+y4/bUPHK+bc87QvLcL+WMw==",
+      "requires": {
+        "@hapi/hoek": "^9.0.0"
+      }
+    },
+    "@sideway/address": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/@sideway/address/-/address-4.1.0.tgz",
+      "integrity": "sha512-wAH/JYRXeIFQRsxerIuLjgUu2Xszam+O5xKeatJ4oudShOOirfmsQ1D6LL54XOU2tizpCYku+s1wmU0SYdpoSA==",
+      "requires": {
+        "@hapi/hoek": "^9.0.0"
+      }
+    },
+    "@sideway/formula": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/@sideway/formula/-/formula-3.0.0.tgz",
+      "integrity": "sha512-vHe7wZ4NOXVfkoRb8T5otiENVlT7a3IAiw7H5M2+GO+9CDgcVUUsX1zalAztCmwyOr2RUTGJdgB+ZvSVqmdHmg=="
+    },
+    "@sideway/pinpoint": {
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diff --git a/07-authentication/07-joi/package.json b/07-authentication/07-joi/package.json
new file mode 100644
index 0000000..2a41d4e
--- /dev/null
+++ b/07-authentication/07-joi/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "description": "",
+  "main": "01-joi.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "4.17.1",
+    "joi": "17.3.0"
+  }
+}
diff --git a/07-authentication/08-auth/01-simple-auth/app.js b/07-authentication/08-auth/01-simple-auth/app.js
new file mode 100644
index 0000000..41144f9
--- /dev/null
+++ b/07-authentication/08-auth/01-simple-auth/app.js
@@ -0,0 +1,25 @@
+'use strict';
+
+const express = require(`express`);
+const expressSession = require(`express-session`);
+const router = require(`./routes/app-router`);
+
+const PORT = 4000;
+const SECRET = `keks31337`;
+
+const app = express();
+
+app.set(`views`, `./views`);
+app.set(`view engine`, `pug`);
+
+app.use(expressSession({
+    secret: SECRET,
+    resave: false,
+    saveUninitialized: false,
+    name: `session_id`
+}));
+
+app.use(express.urlencoded({extended: false}));
+app.use(`/`, router);
+
+app.listen(PORT);
diff --git a/07-authentication/08-auth/01-simple-auth/constants.js b/07-authentication/08-auth/01-simple-auth/constants.js
new file mode 100644
index 0000000..12c3fe1
--- /dev/null
+++ b/07-authentication/08-auth/01-simple-auth/constants.js
@@ -0,0 +1,27 @@
+'use strict';
+
+module.exports.RegisterMessage = {
+    USER_ALREADY_REGISTER: `Пользователь с таким email уже зарегистрирован`,
+    WRONG_EMAIL: `Неправильный email`,
+    REQUIRED_FIELD: `Поле обязательно для заполнения`,
+    MIN_PASSWORD_LENGTH: `Пароль должен быть не меньше 6 символов`,
+    MAX_PASSWORD_LENGTH: `Пароль должен быть не больше 12 символов`,
+    PASSWORDS_NOT_EQUALS: `Пароли не совпадают`,
+    EMPTY_VALUE: `Не указано значение`,
+}
+
+module.exports.LoginMessage = {
+    USER_NOT_EXISTS: `Пользователь с таким email не зарегистрирован`,
+    WRONG_PASSWORD: `Неправильно введён логин или пароль`,
+    WRONG_EMAIL: `Неправильный email`,
+    REQUIRED_FIELD: `Поле обязательно для заполнения`,
+}
+
+module.exports.Template = {
+    LOGIN_PAGE: `login`,
+    REGISTER_PAGE: `register`,
+}
+
+module.exports.MIN_PASSWORD_LENGTH = 6;
+
+module.exports.MAX_PASSWORD_LENGTH = 12;
diff --git a/07-authentication/08-auth/01-simple-auth/middleware/already-register.js b/07-authentication/08-auth/01-simple-auth/middleware/already-register.js
new file mode 100644
index 0000000..d4cc60f
--- /dev/null
+++ b/07-authentication/08-auth/01-simple-auth/middleware/already-register.js
@@ -0,0 +1,15 @@
+'use strict';
+
+const {RegisterMessage} = require(`../constants`);
+
+module.exports = (store) => (
+    async (req, res, next) => {
+        const { username } = req.body
+        if (store.findByEmail(username)) {
+            res.render(`register`, {errorsMessages: [RegisterMessage.USER_ALREADY_REGISTER]});
+            return;
+        }
+
+        next();
+    }
+)
diff --git a/07-authentication/08-auth/01-simple-auth/middleware/authenticate.js b/07-authentication/08-auth/01-simple-auth/middleware/authenticate.js
new file mode 100644
index 0000000..a19f9dc
--- /dev/null
+++ b/07-authentication/08-auth/01-simple-auth/middleware/authenticate.js
@@ -0,0 +1,29 @@
+'use strict';
+
+const {LoginMessage} = require(`../constants`);
+
+module.exports = (store) => (
+    async (req, res, next) => {
+        const { username, password } = req.body;
+        const existsUser = store.findByEmail(username);
+
+        if (!existsUser) {
+            res.render(`login`, {
+                errorsMessages: [LoginMessage.USER_NOT_EXISTS]
+            });
+            return;
+        }
+
+        if (! await store.checkUser(existsUser, password)) {
+            res.render(`login`, {
+                errorsMessages: [LoginMessage.WRONG_PASSWORD]
+            });
+            return;
+        }
+
+        req.session.isLogged = true;
+        req.session.username = existsUser.username;
+
+        next();
+    }
+);
diff --git a/07-authentication/08-auth/01-simple-auth/middleware/private-route.js b/07-authentication/08-auth/01-simple-auth/middleware/private-route.js
new file mode 100644
index 0000000..a8eb6f8
--- /dev/null
+++ b/07-authentication/08-auth/01-simple-auth/middleware/private-route.js
@@ -0,0 +1,11 @@
+'use strict';
+
+module.exports = (req, res, next) => {
+    const { isLogged } = req.session;
+
+    if (!isLogged) {
+        return res.redirect(`/login`);
+    }
+
+    next();
+}
diff --git a/07-authentication/08-auth/01-simple-auth/middleware/schema-validator.js b/07-authentication/08-auth/01-simple-auth/middleware/schema-validator.js
new file mode 100644
index 0000000..95bc180
--- /dev/null
+++ b/07-authentication/08-auth/01-simple-auth/middleware/schema-validator.js
@@ -0,0 +1,18 @@
+'use strict';
+
+module.exports = (schema, template) => (
+    async (req, res, next) => {
+        const { body } = req;
+        try {
+           await schema.validateAsync(body, { abortEarly: false });
+        } catch(err) {
+             const { details } = err;
+             res.render(template, {
+                 errorsMessages: details.map((errorDescription) => errorDescription.message)}
+             );
+             return;
+        }
+
+        next();
+    }
+);
diff --git a/07-authentication/08-auth/01-simple-auth/package-lock.json b/07-authentication/08-auth/01-simple-auth/package-lock.json
new file mode 100644
index 0000000..7840905
--- /dev/null
+++ b/07-authentication/08-auth/01-simple-auth/package-lock.json
@@ -0,0 +1,1196 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@babel/helper-validator-identifier": {
+      "version": "7.10.1",
+      "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.10.1.tgz",
+      "integrity": "sha512-5vW/JXLALhczRCWP0PnFDMCJAchlBvM7f4uk/jXritBnIa6E1KmqmtrS3yn1LAnxFBypQ3eneLuXjsnfQsgILw=="
+    },
+    "@babel/parser": {
+      "version": "7.10.2",
+      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.10.2.tgz",
+      "integrity": "sha512-PApSXlNMJyB4JiGVhCOlzKIif+TKFTvu0aQAhnTvfP/z3vVSN6ZypH5bfUNwFXXjRQtUEBNFd2PtmCmG2Py3qQ=="
+    },
+    "@babel/types": {
+      "version": "7.10.2",
+      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.10.2.tgz",
+      "integrity": "sha512-AD3AwWBSz0AWF0AkCN9VPiWrvldXq+/e3cHa4J89vo4ymjz1XwrBFFVZmkJTsQIPNk+ZVomPSXUJqq8yyjZsng==",
+      "requires": {
+        "@babel/helper-validator-identifier": "^7.10.1",
+        "lodash": "^4.17.13",
+        "to-fast-properties": "^2.0.0"
+      }
+    },
+    "@hapi/hoek": {
+      "version": "9.1.1",
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+    },
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+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/@hapi/topo/-/topo-5.0.0.tgz",
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+      "requires": {
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+        "fs-minipass": "^1.2.5",
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+        "@babel/types": "^7.9.6",
+        "assert-never": "^1.2.1",
+        "babel-walk": "3.0.0-canary-5"
+      }
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+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
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+      "version": "3.1.1",
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+    }
+  }
+}
diff --git a/07-authentication/08-auth/01-simple-auth/package.json b/07-authentication/08-auth/01-simple-auth/package.json
new file mode 100644
index 0000000..1fe417b
--- /dev/null
+++ b/07-authentication/08-auth/01-simple-auth/package.json
@@ -0,0 +1,19 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "description": "",
+  "main": "app.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "bcrypt": "5.0.0",
+    "express": "4.17.1",
+    "express-session": "1.17.1",
+    "joi": "17.3.0",
+    "pug": "3.0.0"
+  }
+}
diff --git a/07-authentication/08-auth/01-simple-auth/routes/app-router.js b/07-authentication/08-auth/01-simple-auth/routes/app-router.js
new file mode 100644
index 0000000..e67ad0f
--- /dev/null
+++ b/07-authentication/08-auth/01-simple-auth/routes/app-router.js
@@ -0,0 +1,60 @@
+'use strict';
+
+const express = require(`express`);
+const privateRoute = require(`../middleware/private-route`);
+const store = require(`../store`);
+const newUserSchema = require(`../schemas/new-user`);
+const userSchema = require(`../schemas/user`);
+const schemaValidator = require(`../middleware/schema-validator`);
+const alreadyRegister = require(`../middleware/already-register`);
+const authenticate = require(`../middleware/authenticate`);
+const {Template} = require(`../constants`);
+
+const appRouter = new express.Router();
+
+// Защищённый маршрут. Доступен только после авторизации
+appRouter.get(`/`, privateRoute, async (req, res) => {
+    const { username } = req.session;
+    res.render(`private`, { username });
+});
+
+// Регистрация
+appRouter.get(`/register`, async (req, res) => {
+    res.render(`register`);
+});
+
+// Обработка регистрационной формы
+appRouter.post(`/register`, [
+        schemaValidator(newUserSchema, Template.REGISTER_PAGE),
+        alreadyRegister(store)
+    ],
+    async (req, res) => {
+        const { username, password } = req.body;
+        await store.add(username, password);
+        res.redirect(`/login`);
+    }
+);
+
+// Вход на сайт
+appRouter.get(`/login`, async (req, res) => {
+    res.render(`login`);
+});
+
+// Обработка формы «Вход»
+appRouter.post(`/login`, [
+        schemaValidator(userSchema, Template.LOGIN_PAGE),
+        authenticate(store)
+    ],
+    async (req, res) => {
+        res.redirect(`/`);
+    }
+);
+
+// Выход
+appRouter.get(`/logout`, async (req, res) => {
+    req.session.destroy(() =>{
+        res.redirect(`/login`);
+    });
+});
+
+module.exports = appRouter;
diff --git a/07-authentication/08-auth/01-simple-auth/schemas/new-user.js b/07-authentication/08-auth/01-simple-auth/schemas/new-user.js
new file mode 100644
index 0000000..2af97c6
--- /dev/null
+++ b/07-authentication/08-auth/01-simple-auth/schemas/new-user.js
@@ -0,0 +1,38 @@
+'use strict';
+
+const Joi = require(`joi`);
+const {
+    RegisterMessage,
+    MIN_PASSWORD_LENGTH,
+    MAX_PASSWORD_LENGTH
+} = require(`../constants`);
+
+module.exports = Joi.object({
+
+    username: Joi.string()
+                .required()
+                .email()
+                .messages({
+                    'string.email': RegisterMessage.WRONG_EMAIL,
+                    'any.required': RegisterMessage.REQUIRED_FIELD,
+                }),
+
+    password: Joi.string()
+                .required()
+                .min(MIN_PASSWORD_LENGTH)
+                .max(MAX_PASSWORD_LENGTH)
+                .messages({
+                    'string.min': RegisterMessage.MIN_PASSWORD_LENGTH,
+                    'string.max': RegisterMessage.MAX_PASSWORD_LENGTH,
+                    'any.required': RegisterMessage.REQUIRED_FIELD,
+                }),
+
+    repeat: Joi.string()
+                .required()
+                .valid(Joi.ref('password'))
+                .messages({
+                    'any.only': RegisterMessage.PASSWORDS_NOT_EQUALS,
+                    'any.required': RegisterMessage.REQUIRED_FIELD,
+                }),
+
+});
diff --git a/07-authentication/08-auth/01-simple-auth/schemas/user.js b/07-authentication/08-auth/01-simple-auth/schemas/user.js
new file mode 100644
index 0000000..c390e3b
--- /dev/null
+++ b/07-authentication/08-auth/01-simple-auth/schemas/user.js
@@ -0,0 +1,22 @@
+'use strict';
+
+const Joi = require(`joi`);
+const {LoginMessage} = require(`../constants`);
+
+module.exports = Joi.object({
+
+    username: Joi.string()
+                .required()
+                .email()
+                .messages({
+                    'string.email': LoginMessage.WRONG_EMAIL,
+                    'any.required': LoginMessage.REQUIRED_FIELD,
+                }),
+
+    password: Joi.string()
+                .required()
+                .messages({
+                    'any.required': LoginMessage.REQUIRED_FIELD,
+                }),
+
+});
diff --git a/07-authentication/08-auth/01-simple-auth/store.js b/07-authentication/08-auth/01-simple-auth/store.js
new file mode 100644
index 0000000..a13182a
--- /dev/null
+++ b/07-authentication/08-auth/01-simple-auth/store.js
@@ -0,0 +1,26 @@
+'use strict';
+
+const bcrypt = require(`bcrypt`);
+const saltRounds = 10;
+
+class Store {
+    constructor () {
+        this._users = [];
+    }
+
+    async add(username, password) {
+        const hash = await bcrypt.hash(password, saltRounds);
+        this._users.push({ username, password: hash});
+    }
+
+    findByEmail(email) {
+        return this._users.find((user) => user.username === email);
+    }
+
+    async checkUser(user, password) {
+        const match = await bcrypt.compare(password, user.password);
+        return match;
+    }
+}
+
+module.exports = new Store();
diff --git a/07-authentication/08-auth/01-simple-auth/views/layout.pug b/07-authentication/08-auth/01-simple-auth/views/layout.pug
new file mode 100644
index 0000000..2cd82cd
--- /dev/null
+++ b/07-authentication/08-auth/01-simple-auth/views/layout.pug
@@ -0,0 +1,30 @@
+doctype html
+html
+  head
+    title Демонстрация: «Аутентификация»
+    meta(charset='UTF-8')
+    style.
+      form {
+        display: flex;
+        flex-direction: column;
+        flex-wrap: wrap;
+        justify-content: center;
+        width: 300px;
+      }
+
+      label {
+        font-weight: bold;
+        padding: 8px 0;
+      }
+
+      input {
+        padding: 10px;
+        width: 100%;
+      }
+
+      button {
+        padding: 10px;
+        margin-top: 15px;
+      }
+  body
+    block content
diff --git a/07-authentication/08-auth/01-simple-auth/views/login.pug b/07-authentication/08-auth/01-simple-auth/views/login.pug
new file mode 100644
index 0000000..7cc9583
--- /dev/null
+++ b/07-authentication/08-auth/01-simple-auth/views/login.pug
@@ -0,0 +1,14 @@
+extends layout.pug
+
+block content
+  h1 Вход
+  form(action='https://github.com/login', method='POST')
+    label(for='username') Имя пользователя:
+    input#username.field(type='email', name='username')
+    label(for='password') Пароль:
+    input#password(type='password', name='password')
+    button(type='submit') Войти
+    if errorsMessages
+      ul
+        each error in errorsMessages
+          li #{error}
diff --git a/07-authentication/08-auth/01-simple-auth/views/private.pug b/07-authentication/08-auth/01-simple-auth/views/private.pug
new file mode 100644
index 0000000..1508baa
--- /dev/null
+++ b/07-authentication/08-auth/01-simple-auth/views/private.pug
@@ -0,0 +1,6 @@
+extends layout.pug
+
+block content
+  h1 Добро пожаловать в секретный раздел!
+  p Вы вошли под логином #{username}. Для выхода нажмите <a href="https://github.com/logout">здесь</a>.
+
diff --git a/07-authentication/08-auth/01-simple-auth/views/register.pug b/07-authentication/08-auth/01-simple-auth/views/register.pug
new file mode 100644
index 0000000..ac00871
--- /dev/null
+++ b/07-authentication/08-auth/01-simple-auth/views/register.pug
@@ -0,0 +1,16 @@
+extends layout.pug
+
+block content
+  h1 Регистрация
+  form.register-form(action='https://github.com/register', method='POST', autocomplete='off')
+    label(for='username') Имя пользователя:
+    input#username.field(type='email', name='username')
+    label(for='password') Пароль:
+    input#password(type='password', name='password')
+    label(for='repeat-password') Повтор пароля:
+    input#repeat-password(type='password', name='repeat')
+    button(type='submit') Зарегистрироваться
+    if errorsMessages
+      ul
+        each error in errorsMessages
+          li #{error}
diff --git a/07-authentication/08-auth/02-jwt/app.js b/07-authentication/08-auth/02-jwt/app.js
new file mode 100644
index 0000000..0c085d6
--- /dev/null
+++ b/07-authentication/08-auth/02-jwt/app.js
@@ -0,0 +1,16 @@
+'use strict';
+
+require(`./fill-store`);
+
+const express = require(`express`);
+const authRouter = require(`./routes/user-router`);
+const booksRouter = require(`./routes/books-router`);
+
+const PORT = 4000;
+const app = express();
+
+app.use(express.json());
+app.use(`/user`, authRouter);
+app.use(`/`, booksRouter);
+
+app.listen(PORT);
diff --git a/07-authentication/08-auth/02-jwt/constants.js b/07-authentication/08-auth/02-jwt/constants.js
new file mode 100644
index 0000000..274c8d0
--- /dev/null
+++ b/07-authentication/08-auth/02-jwt/constants.js
@@ -0,0 +1,29 @@
+'use strict';
+
+module.exports.JWT_ACCESS_SECRET = `secret`;
+module.exports.JWT_REFRESH_SECRET = `secret-refresh`;
+
+module.exports.RegisterMessage = {
+    USER_ALREADY_REGISTER: `Пользователь с таким email уже зарегистрирован`,
+    WRONG_EMAIL: `Неправильный email`,
+    REQUIRED_FIELD: `Поле обязательно для заполнения`,
+    MIN_PASSWORD_LENGTH: `Пароль должен быть не меньше 6 символов`,
+    MAX_PASSWORD_LENGTH: `Пароль должен быть не больше 12 символов`,
+    PASSWORDS_NOT_EQUALS: `Пароли не совпадают`,
+    EMPTY_VALUE: `Не указано значение`,
+}
+
+module.exports.LoginMessage = {
+    USER_NOT_EXISTS: `Пользователь с таким email не зарегистрирован`,
+    WRONG_PASSWORD: `Неправильно введён логин или пароль`,
+    WRONG_EMAIL: `Неправильный email`,
+    REQUIRED_FIELD: `Поле обязательно для заполнения`,
+}
+
+module.exports.Template = {
+    LOGIN_PAGE: `login`,
+    REGISTER_PAGE: `register`,
+}
+
+module.exports.MIN_PASSWORD_LENGTH = 6;
+module.exports.MAX_PASSWORD_LENGTH = 12;
diff --git a/07-authentication/08-auth/02-jwt/fill-store.js b/07-authentication/08-auth/02-jwt/fill-store.js
new file mode 100644
index 0000000..c4dd9c8
--- /dev/null
+++ b/07-authentication/08-auth/02-jwt/fill-store.js
@@ -0,0 +1,8 @@
+'use strict';
+
+const storeService = require(`./services/store-service`);
+
+(async() => {
+    await storeService.add(`user@web.com`, `123456`);
+    console.log(`Добавлен тестовый пользователь user@web.com`);
+})();
diff --git a/07-authentication/08-auth/02-jwt/jwt-helper.js b/07-authentication/08-auth/02-jwt/jwt-helper.js
new file mode 100644
index 0000000..307ba5b
--- /dev/null
+++ b/07-authentication/08-auth/02-jwt/jwt-helper.js
@@ -0,0 +1,10 @@
+'use strict';
+
+const jwt = require(`jsonwebtoken`);
+const {JWT_ACCESS_SECRET, JWT_REFRESH_SECRET} = require(`./constants`);
+
+module.exports.makeTokens = (tokenData) => {
+    const accessToken = jwt.sign(tokenData, JWT_ACCESS_SECRET,  { expiresIn: `50s`});
+    const refreshToken = jwt.sign(tokenData, JWT_REFRESH_SECRET);
+    return {accessToken, refreshToken};
+};
diff --git a/07-authentication/08-auth/02-jwt/middlewares/authenticate-jwt.js b/07-authentication/08-auth/02-jwt/middlewares/authenticate-jwt.js
new file mode 100644
index 0000000..9754979
--- /dev/null
+++ b/07-authentication/08-auth/02-jwt/middlewares/authenticate-jwt.js
@@ -0,0 +1,31 @@
+'use strict';
+
+const jwt = require(`jsonwebtoken`);
+const HttpStatus = require(`http-status-codes`);
+
+const {JWT_ACCESS_SECRET} = require(`../constants`);
+
+module.exports = (req, res, next) => {
+    const authorization = req.headers[`authorization`]
+
+    if (! authorization) {
+        return res.sendStatus(HttpStatus.UNAUTHORIZED);
+    }
+
+    const [, token] = authorization.split(` `);
+
+    if (!token) {
+        return res.sendStatus(HttpStatus.UNAUTHORIZED);
+    }
+
+    jwt.verify(token, JWT_ACCESS_SECRET, (err, userData) => {
+
+        if (err) {
+            return res.sendStatus(HttpStatus.FORBIDDEN);
+        }
+
+        // Что-то можно делать с данными из `userData`.
+        // Например сохранить res.locals для дальнейшего использования
+        next()
+    })
+}
diff --git a/07-authentication/08-auth/02-jwt/middlewares/authenticate.js b/07-authentication/08-auth/02-jwt/middlewares/authenticate.js
new file mode 100644
index 0000000..fdcb927
--- /dev/null
+++ b/07-authentication/08-auth/02-jwt/middlewares/authenticate.js
@@ -0,0 +1,28 @@
+'use strict';
+
+const {LoginMessage} = require(`../constants`);
+const HttpStatus = require(`http-status-codes`);
+
+module.exports = (store) => (
+    async (req, res, next) => {
+        const { username, password } = req.body;
+        const existsUser = await store.findByEmail(username);
+
+        if (!existsUser) {
+            res.status(HttpStatus.FORBIDDEN)
+                .json({ message: LoginMessage.USER_NOT_EXISTS});
+
+            return;
+        }
+
+        if (! await store.checkUser(existsUser, password)) {
+            res.status(HttpStatus.FORBIDDEN)
+                .json({message: LoginMessage.WRONG_PASSWORD});
+
+            return;
+        }
+
+        res.locals.user = existsUser;
+        next();
+    }
+);
diff --git a/07-authentication/08-auth/02-jwt/mocks/books.js b/07-authentication/08-auth/02-jwt/mocks/books.js
new file mode 100644
index 0000000..763914f
--- /dev/null
+++ b/07-authentication/08-auth/02-jwt/mocks/books.js
@@ -0,0 +1,18 @@
+module.exports = [
+    {
+        "id": 1,
+        "title": `Сияние`,
+    },
+    {
+        "id": 2,
+        "title": `Оно`,
+    },
+    {
+        "id": 3,
+        "title": `Глаза дракона`,
+    },
+    {
+        "id": 4,
+        "title": `Куджо`,
+    },
+];
diff --git a/07-authentication/08-auth/02-jwt/package-lock.json b/07-authentication/08-auth/02-jwt/package-lock.json
new file mode 100644
index 0000000..4de53b3
--- /dev/null
+++ b/07-authentication/08-auth/02-jwt/package-lock.json
@@ -0,0 +1,939 @@
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+        "chownr": "^1.1.1",
+        "fs-minipass": "^1.2.5",
+        "minipass": "^2.8.6",
+        "minizlib": "^1.2.1",
+        "mkdirp": "^0.5.0",
+        "safe-buffer": "^5.1.2",
+        "yallist": "^3.0.3"
+      }
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+      "version": "1.0.0",
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+        "media-typer": "0.3.0",
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+    }
+  }
+}
diff --git a/07-authentication/08-auth/02-jwt/package.json b/07-authentication/08-auth/02-jwt/package.json
new file mode 100644
index 0000000..bfbade2
--- /dev/null
+++ b/07-authentication/08-auth/02-jwt/package.json
@@ -0,0 +1,20 @@
+{
+  "name": "02-jwt",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "start": "node app.js",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "bcrypt": "5.0.0",
+    "express": "4.17.1",
+    "http-status-codes": "1.4.0",
+    "jsonwebtoken": "8.5.1",
+    "nanoid": "3.1.10"
+  }
+}
diff --git a/07-authentication/08-auth/02-jwt/routes/books-router.js b/07-authentication/08-auth/02-jwt/routes/books-router.js
new file mode 100644
index 0000000..0a4e7bd
--- /dev/null
+++ b/07-authentication/08-auth/02-jwt/routes/books-router.js
@@ -0,0 +1,14 @@
+'use strict';
+
+const {Router} = require(`express`);
+const authenticateJwt = require(`../middlewares/authenticate-jwt`);
+
+const bookMocks = require(`../mocks/books`);
+
+const booksRouter = new Router();
+
+booksRouter.get(`/books`, authenticateJwt, (req, res) => {
+    res.json(bookMocks);
+});
+
+module.exports = booksRouter;
diff --git a/07-authentication/08-auth/02-jwt/routes/user-router.js b/07-authentication/08-auth/02-jwt/routes/user-router.js
new file mode 100644
index 0000000..6204c92
--- /dev/null
+++ b/07-authentication/08-auth/02-jwt/routes/user-router.js
@@ -0,0 +1,58 @@
+'use strict';
+
+const {Router} = require(`express`);
+const jwt = require(`jsonwebtoken`);
+const HttpStatus = require(`http-status-codes`);
+const storeService = require(`../services/store-service`);
+const refreshTokenService = require(`../services/refresh-token-service`);
+const authenticate = require(`../middlewares/authenticate`);
+const authenticateJwt = require(`../middlewares/authenticate-jwt`);
+const {makeTokens} = require(`../jwt-helper`);
+const {JWT_ACCESS_SECRET, JWT_REFRESH_SECRET} = require(`../constants`);
+
+const userRouter = new Router();
+
+userRouter.post(`/login`, authenticate(storeService), async (req, res) => {
+    const {id} = res.locals.user;
+    const {accessToken, refreshToken}  = makeTokens({id});
+
+    await refreshTokenService.add(refreshToken);
+    res.json({accessToken, refreshToken});
+});
+
+
+userRouter.post(`/refresh`, async (req, res) => {
+    const { token } = req.body;
+
+    if (!token) {
+        return res.sendStatus(HttpStatus.BAD_REQUEST);
+    };
+
+    const existToken = await refreshTokenService.find(token);
+
+    if (!existToken) {
+        return res.sendStatus(HttpStatus.NOT_FOUND);
+    }
+
+    jwt.verify(token, JWT_REFRESH_SECRET, async (err, userData) => {
+        if (err) {
+            return res.sendStatus(HttpStatus.FORBIDDEN);
+        }
+
+        const {id} = userData;
+        const {accessToken, refreshToken}  = makeTokens({id});
+
+        await refreshTokenService.drop(existToken);
+        await refreshTokenService.add(refreshToken);
+
+        res.json({accessToken, refreshToken});
+    });
+});
+
+userRouter.delete(`/logout`, authenticateJwt, (req, res) => {
+    const {token} = req.body;
+    refreshTokenService.drop(token);
+    res.sendStatus(HttpStatus.NO_CONTENT);
+})
+
+module.exports = userRouter;
diff --git a/07-authentication/08-auth/02-jwt/services/refresh-token-service.js b/07-authentication/08-auth/02-jwt/services/refresh-token-service.js
new file mode 100644
index 0000000..522be67
--- /dev/null
+++ b/07-authentication/08-auth/02-jwt/services/refresh-token-service.js
@@ -0,0 +1,22 @@
+'use strict';
+
+class RefreshTokenService {
+    constructor () {
+        this._refreshTokens = [];
+    }
+
+    async add(token) {
+        this._refreshTokens.push(token);
+    }
+
+    async find(token) {
+        return this._refreshTokens.find( (refreshToken) => refreshToken === token);
+    }
+
+    async drop(token) {
+        this._refreshTokens = this._refreshTokens
+            .filter((refreshToken) => token !== refreshToken);
+    }
+}
+
+module.exports = new RefreshTokenService();
diff --git a/07-authentication/08-auth/02-jwt/services/store-service.js b/07-authentication/08-auth/02-jwt/services/store-service.js
new file mode 100644
index 0000000..5dc2876
--- /dev/null
+++ b/07-authentication/08-auth/02-jwt/services/store-service.js
@@ -0,0 +1,29 @@
+'use strict';
+
+const bcrypt = require(`bcrypt`);
+const {nanoid} = require(`nanoid`);
+
+const saltRounds = 10;
+
+class StoreService {
+    constructor () {
+        this._users = [];
+    }
+
+    async add(username, password) {
+        const hash = await bcrypt.hash(password, saltRounds);
+        const id = nanoid();
+        this._users.push({ id, username, password: hash});
+    }
+
+    async findByEmail(email) {
+        return this._users.find((user) => user.username === email);
+    }
+
+    async checkUser(user, password) {
+        const match = await bcrypt.compare(password, user.password);
+        return match;
+    }
+}
+
+module.exports = new StoreService();
diff --git a/07-authentication/08-auth/02-jwt/test-jwt.http b/07-authentication/08-auth/02-jwt/test-jwt.http
new file mode 100644
index 0000000..b7f5551
--- /dev/null
+++ b/07-authentication/08-auth/02-jwt/test-jwt.http
@@ -0,0 +1,37 @@
+# Получение нового JWT токена
+POST http://localhost:4000/user/login HTTP/1.1
+Content-Type: application/json
+
+{
+  "username": "user@web.com",
+  "password": "123456"
+}
+
+###
+
+# Обновление токена
+POST http://localhost:4000/user/refresh HTTP/1.1
+Content-Type: application/json
+
+{
+  "token": ""
+}
+
+###
+
+# Отзыв токена
+DELETE http://localhost:4000/user/logout HTTP/1.1
+Content-Type: application/json
+Authorization: Bearer <Токен>
+
+{
+  "token": ""
+}
+
+###
+
+# Информация о книгах (защищённый маршрут)
+GET http://localhost:4000/books HTTP/1.1
+authorization: Bearer <Токен>
+
+
diff --git a/08-realtime/02-concurrently/01-system-operators/first-server.js b/08-realtime/02-concurrently/01-system-operators/first-server.js
new file mode 100644
index 0000000..a4ff341
--- /dev/null
+++ b/08-realtime/02-concurrently/01-system-operators/first-server.js
@@ -0,0 +1,10 @@
+'use strict';
+
+const express = require(`express`);
+
+const PORT = 4000;
+const app = express();
+
+app.listen(PORT, () => {
+    console.log(`Ожидаю подключений на ${PORT}`);
+});
diff --git a/08-realtime/02-concurrently/01-system-operators/package.json b/08-realtime/02-concurrently/01-system-operators/package.json
new file mode 100644
index 0000000..62d7844
--- /dev/null
+++ b/08-realtime/02-concurrently/01-system-operators/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "02-jwt",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "start": "node first-server.js & node second-server.js",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "4.17.1"
+  }
+}
diff --git a/08-realtime/02-concurrently/01-system-operators/second-server.js b/08-realtime/02-concurrently/01-system-operators/second-server.js
new file mode 100644
index 0000000..bd4bdc1
--- /dev/null
+++ b/08-realtime/02-concurrently/01-system-operators/second-server.js
@@ -0,0 +1,10 @@
+'use strict';
+
+const express = require(`express`);
+
+const PORT = 5000;
+const app = express();
+
+app.listen(PORT, () => {
+    console.log(`Ожидаю подключений на ${PORT}`);
+});
diff --git a/08-realtime/02-concurrently/02-concurrently/first-server.js b/08-realtime/02-concurrently/02-concurrently/first-server.js
new file mode 100644
index 0000000..a5c75fe
--- /dev/null
+++ b/08-realtime/02-concurrently/02-concurrently/first-server.js
@@ -0,0 +1,11 @@
+'use strict';
+
+const express = require(`express`);
+
+const PORT = 4000;
+const app = express();
+
+console.log(`Подготовка сервера к запуску на ${PORT}…`);
+app.listen(PORT, () => {
+    console.log(`Ожидаю подключений на ${PORT}`);
+});
diff --git a/08-realtime/02-concurrently/02-concurrently/package-lock.json b/08-realtime/02-concurrently/02-concurrently/package-lock.json
new file mode 100644
index 0000000..2ec2051
--- /dev/null
+++ b/08-realtime/02-concurrently/02-concurrently/package-lock.json
@@ -0,0 +1,391 @@
+{
+  "name": "02-jwt",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "ansi-regex": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-4.1.0.tgz",
+      "integrity": "sha512-1apePfXM1UOSqw0o9IiFAovVz9M5S1Dg+4TrDwfMewQ6p/rmMueb7tWZjQ1rx4Loy1ArBggoqGpfqqdI4rondg=="
+    },
+    "ansi-styles": {
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+      "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+      "requires": {
+        "color-convert": "^1.9.0"
+      }
+    },
+    "camelcase": {
+      "version": "5.3.1",
+      "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-5.3.1.tgz",
+      "integrity": "sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg=="
+    },
+    "chalk": {
+      "version": "2.4.2",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
+      "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
+      "requires": {
+        "ansi-styles": "^3.2.1",
+        "escape-string-regexp": "^1.0.5",
+        "supports-color": "^5.3.0"
+      },
+      "dependencies": {
+        "supports-color": {
+          "version": "5.5.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+          "requires": {
+            "has-flag": "^3.0.0"
+          }
+        }
+      }
+    },
+    "cliui": {
+      "version": "5.0.0",
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+      "requires": {
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+}
diff --git a/08-realtime/02-concurrently/02-concurrently/package.json b/08-realtime/02-concurrently/02-concurrently/package.json
new file mode 100644
index 0000000..c1a31d3
--- /dev/null
+++ b/08-realtime/02-concurrently/02-concurrently/package.json
@@ -0,0 +1,19 @@
+{
+  "name": "02-jwt",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "start": "concurrently \"npm:run:first\" \"npm:run:second\"",
+    "run:first": "node first-server.js",
+    "run:second": "node second-server.js",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "concurrently": "5.2.0",
+    "express": "4.17.1"
+  }
+}
diff --git a/08-realtime/02-concurrently/02-concurrently/second-server.js b/08-realtime/02-concurrently/02-concurrently/second-server.js
new file mode 100644
index 0000000..b17d052
--- /dev/null
+++ b/08-realtime/02-concurrently/02-concurrently/second-server.js
@@ -0,0 +1,11 @@
+'use strict';
+
+const express = require(`express`);
+
+const PORT = 5000;
+const app = express();
+
+console.log(`Подготовка сервера к запуску на ${PORT}…`);
+app.listen(PORT, () => {
+    console.log(`Ожидаю подключений на ${PORT}`);
+});
diff --git a/08-realtime/03-event-emitter/01-pub-sub.js b/08-realtime/03-event-emitter/01-pub-sub.js
new file mode 100644
index 0000000..ef2226f
--- /dev/null
+++ b/08-realtime/03-event-emitter/01-pub-sub.js
@@ -0,0 +1,35 @@
+'use strict';
+
+class PubSub {
+    constructor () {
+        this._listeners = {};
+    }
+
+    addListener(event, fn) {
+        if (! this._listeners[event]) {
+            this._listeners[event] = [];
+        }
+
+        this._listeners[event].push(fn)
+    }
+
+    removeListener(event, fn) {
+        if (! this._listeners[event]) {
+            return;
+        }
+
+        this._listeners[event] = this._listeners[event]
+            .filter((listener) => listener === fn);
+    }
+
+    emit(event, data) {
+        if (! this._listeners[event]) {
+            return;
+        }
+
+        this._listeners[event]
+            .forEach((listener) => listener(data));
+    }
+}
+
+module.exports = PubSub;
diff --git a/08-realtime/03-event-emitter/02-make-pizza.js b/08-realtime/03-event-emitter/02-make-pizza.js
new file mode 100644
index 0000000..912e6dd
--- /dev/null
+++ b/08-realtime/03-event-emitter/02-make-pizza.js
@@ -0,0 +1,53 @@
+'use strict';
+
+const PubSub = require(`./01-pub-sub`);
+
+const TIME_INTERVAL = 1000;
+const DEFAULT_STEP = -1;
+const PIZZA_STATUSES = [
+    `orderAccept`,
+    `prepareDough`,
+    `prepareToping`,
+    `bakingPizza`,
+    `done`
+];
+
+class Pizza extends PubSub {
+    constructor(name) {
+        super();
+        this._name = name;
+        this._step = DEFAULT_STEP;
+        this._cook = this._cook.bind(this);
+        this._timerId = null;
+    }
+
+    start() {
+        this._reset();
+        this._timerId = setInterval(this._cook, TIME_INTERVAL);
+    }
+
+    _reset() {
+        this._step = DEFAULT_STEP;
+        clearInterval(this._timerId);
+    }
+
+    _cook() {
+        this._step++;
+
+        const currentStep = PIZZA_STATUSES[this._step];
+        this.emit(currentStep, `Статус пиццы «${this._name}»: ${currentStep}`);
+
+        if (this._step === PIZZA_STATUSES.length - 1) {
+            this._reset();
+        }
+    }
+}
+
+const myPizza = new Pizza(`Четыре сезона`);
+
+myPizza.addListener(`orderAccept`, (data) => console.log(data));
+myPizza.addListener(`bakingPizza`, (data) => console.log(data));
+myPizza.addListener(`prepareToping`, (data) => console.log(data));
+myPizza.addListener(`done`, (data) => console.log(data));
+
+myPizza.start();
diff --git a/08-realtime/03-event-emitter/03-event-emitter.js b/08-realtime/03-event-emitter/03-event-emitter.js
new file mode 100644
index 0000000..22715e5
--- /dev/null
+++ b/08-realtime/03-event-emitter/03-event-emitter.js
@@ -0,0 +1,54 @@
+'use strict';
+
+const EventEmitter = require(`events`);
+
+const TIME_INTERVAL = 1000;
+const DEFAULT_STEP = -1;
+const PIZZA_STATUSES = [
+    `orderAccept`,
+    `prepareDough`,
+    `prepareToping`,
+    `bakingPizza`,
+    `done`
+];
+
+class Pizza extends EventEmitter {
+    constructor(name) {
+        super();
+        this._name = name;
+        this._step = DEFAULT_STEP;
+        this._cook = this._cook.bind(this);
+        this._timerId = null;
+    }
+
+    start() {
+        this._reset();
+        this._timerId = setInterval(this._cook, TIME_INTERVAL);
+    }
+
+    _reset() {
+        this._step = DEFAULT_STEP;
+        clearInterval(this._timerId);
+    }
+
+    _cook() {
+        this._step++;
+
+        const currentStep = PIZZA_STATUSES[this._step];
+        this.emit(currentStep, `Статус пиццы «${this._name}»: ${currentStep}`);
+
+        if (this._step === PIZZA_STATUSES.length - 1) {
+            this._reset();
+        }
+    }
+}
+
+const myPizza = new Pizza(`Четыре сезона`);
+
+myPizza.addListener(`orderAccept`, (data) => console.log(data));
+myPizza.addListener(`bakingPizza`, (data) => console.log(data));
+
+myPizza.addListener(`prepareToping`, (data) => console.log(data));
+myPizza.addListener(`done`, (data) => console.log(data));
+
+myPizza.start();
diff --git a/08-realtime/03-event-emitter/04-http-server.js b/08-realtime/03-event-emitter/04-http-server.js
new file mode 100644
index 0000000..55a971d
--- /dev/null
+++ b/08-realtime/03-event-emitter/04-http-server.js
@@ -0,0 +1,15 @@
+'use strict';
+
+const http = require(`http`);
+
+const onClientConnect = (request, response) => {
+  const userAgent = request.headers[`user-agent`];
+  response.end(`Hello, ${userAgent}!`);
+};
+
+const port = 8000;
+const httpServer = http.createServer(onClientConnect);
+
+httpServer.on(`listening`, () => console.log(`Принимаю подключения на ${port}`));
+httpServer.on(`connection`, (socket) => console.log(`Подключился новый клиент: ${socket.remoteAddress}`));
+httpServer.listen(port);
diff --git a/08-realtime/03-event-emitter/05-sync-or-async.js b/08-realtime/03-event-emitter/05-sync-or-async.js
new file mode 100644
index 0000000..a2d48e6
--- /dev/null
+++ b/08-realtime/03-event-emitter/05-sync-or-async.js
@@ -0,0 +1,20 @@
+'use strict';
+
+const EventEmitter = require(`events`);
+
+class SimpleEmitter extends EventEmitter {
+    start(fn) {
+        console.log(`Вызов метода «start»…`);
+        this.emit(`firstEvent`);
+        fn();
+        fn()
+        this.emit(`secondEvent`);
+        console.log(`Завершение метода «start»…`);
+    }
+}
+
+const mySimpleEmitter = new SimpleEmitter();
+mySimpleEmitter.on(`firstEvent`, () => console.log(`firstEvent`));
+mySimpleEmitter.on(`secondEvent`, () => console.log(`secondEvent`));
+
+mySimpleEmitter.start(() => console.log(`Поехали!`));
diff --git a/08-realtime/04-streams/01-intro-buffer.js b/08-realtime/04-streams/01-intro-buffer.js
new file mode 100644
index 0000000..087de44
--- /dev/null
+++ b/08-realtime/04-streams/01-intro-buffer.js
@@ -0,0 +1,9 @@
+'use strict';
+
+// Создадим новый буфер
+const buffer = Buffer.alloc(5);
+console.log(buffer);
+
+// Создадим новый буфер из строки
+const anotherBuffer = Buffer.from(`Hello`);
+console.log(anotherBuffer);
diff --git a/08-realtime/04-streams/02-write-to-buffer.js b/08-realtime/04-streams/02-write-to-buffer.js
new file mode 100644
index 0000000..b0297c3
--- /dev/null
+++ b/08-realtime/04-streams/02-write-to-buffer.js
@@ -0,0 +1,15 @@
+'use strict';
+
+const buffer = Buffer.alloc(5);
+const anotherBuffer = Buffer.alloc(2);
+
+// Запишем в первый буфер строку «World»
+buffer.write(`World`);
+console.log(buffer);
+
+// Попробуем записать в во второй буфер фразу «Great World»
+anotherBuffer.write(`Great World`);
+console.log(anotherBuffer);
+
+// Прочитаем буфер
+console.log(anotherBuffer.toString());
diff --git a/08-realtime/04-streams/03-write-to-filled-buffer.js b/08-realtime/04-streams/03-write-to-filled-buffer.js
new file mode 100644
index 0000000..ab09318
--- /dev/null
+++ b/08-realtime/04-streams/03-write-to-filled-buffer.js
@@ -0,0 +1,5 @@
+'use strict';
+
+const buffer = Buffer.from(`HTML`);
+buffer.write(`CSS`);
+console.log(buffer.toString());
diff --git a/08-realtime/04-streams/04-extented-write.js b/08-realtime/04-streams/04-extented-write.js
new file mode 100644
index 0000000..8b61c72
--- /dev/null
+++ b/08-realtime/04-streams/04-extented-write.js
@@ -0,0 +1,5 @@
+'use strict';
+
+const buffer = Buffer.from(`HTML`);
+buffer.write(`CSS`, 1, );
+console.log(buffer.toString(), 1, 3, 'utf8');
diff --git a/08-realtime/04-streams/05-read-stream.js b/08-realtime/04-streams/05-read-stream.js
new file mode 100644
index 0000000..902b85e
--- /dev/null
+++ b/08-realtime/04-streams/05-read-stream.js
@@ -0,0 +1,31 @@
+'use strict';
+
+const path = require(`path`);
+const {createReadStream} = require(`fs`);
+
+const FILE_PATH = path.resolve(__dirname, `example.txt`);
+const READ_SIZE = 16000;
+
+const readStream = createReadStream(FILE_PATH, {highWaterMark: READ_SIZE});
+
+let totalSize = 0;
+
+readStream.on(`readable`, () => {
+    let chunk = readStream.read(READ_SIZE);
+    while (null !== chunk) {
+        console.log(`Прочитано ${chunk.length} байт.`);
+        totalSize += chunk.length;
+        chunk = readStream.read(READ_SIZE);
+    }
+});
+
+readStream.once(`end`, () => {
+    console.log(`Прочитано всего: ${totalSize}`);
+});
+
+readStream.once(`close`, () => {
+    console.log(`Поток закрыт.`);
+});
+
+
+
diff --git a/08-realtime/04-streams/06-make-big-file.js b/08-realtime/04-streams/06-make-big-file.js
new file mode 100644
index 0000000..7a3e5f7
--- /dev/null
+++ b/08-realtime/04-streams/06-make-big-file.js
@@ -0,0 +1,24 @@
+'use strict';
+
+const fs = require(`fs`);
+
+const FILE_PATH = `./big-file.txt`;
+const CYCLES = 1e9;
+
+const buffer = Buffer.from(`Hello, world!`);
+
+const makeBigFile = async () => {
+    const writeStream = fs.createWriteStream(FILE_PATH, `utf8`);
+    writeStream.on(`finish`, () => console.log(`Запись завершена`));
+
+    for (let i = 0; i < CYCLES; i++) {
+        if (!writeStream.write(buffer)) {
+            await new Promise((resolve) => writeStream.once(`drain`, resolve));
+        }
+    }
+
+    writeStream.end();
+
+}
+
+makeBigFile();
diff --git a/08-realtime/04-streams/07-bad-copy-file.js b/08-realtime/04-streams/07-bad-copy-file.js
new file mode 100644
index 0000000..5e06650
--- /dev/null
+++ b/08-realtime/04-streams/07-bad-copy-file.js
@@ -0,0 +1,14 @@
+'use strict';
+
+const fs = require(`fs`).promises;
+
+const sourcePath = process.argv[2];
+const destPath = process.argv[3];
+
+const copyFile = async () => {
+    const firstFileData = await fs.readFile(sourcePath);
+    await fs.writeFile(destPath, firstFileData);
+    console.log(`Файл скопирован…`);
+}
+
+copyFile();
diff --git a/08-realtime/04-streams/08-copy-file.js b/08-realtime/04-streams/08-copy-file.js
new file mode 100644
index 0000000..232b0a6
--- /dev/null
+++ b/08-realtime/04-streams/08-copy-file.js
@@ -0,0 +1,30 @@
+'use strict';
+
+const fs = require(`fs`);
+
+const READ_SIZE = 16384;
+
+const sourcePath = process.argv[2];
+const destPath = process.argv[3];
+
+const copyFile = async () => {
+    const sourceFile = fs.createReadStream(sourcePath);
+    const destFile = fs.createWriteStream(destPath);
+
+    destFile.once(`finish`, () => console.log(`Файл скопирован…`));
+
+    sourceFile.on(`readable`, async () => {
+        let chunk = sourceFile.read(READ_SIZE);
+        while (chunk !== null) {
+            if (!destFile.write(chunk)) {
+                await new Promise((resolve) => destFile.once(`drain`, resolve));
+            }
+
+            chunk = sourceFile.read(READ_SIZE);
+        }
+
+        destFile.end();
+    });
+}
+
+copyFile();
diff --git a/08-realtime/04-streams/09-pipe.js b/08-realtime/04-streams/09-pipe.js
new file mode 100644
index 0000000..14ae954
--- /dev/null
+++ b/08-realtime/04-streams/09-pipe.js
@@ -0,0 +1,15 @@
+'use strict';
+
+const fs = require(`fs`);
+
+const sourcePath = process.argv[2];
+const destPath = process.argv[3];
+
+const copyFile = () => {
+    const sourceFile = fs.createReadStream(sourcePath);
+    const destFile = fs.createWriteStream(destPath);
+    destFile.on(`finish`, () => console.log(`Файл скопирован…`));
+    sourceFile.pipe(destFile);
+}
+
+copyFile();
diff --git a/08-realtime/05-websockets/01-intro-sockets/01-intro-sockets.js b/08-realtime/05-websockets/01-intro-sockets/01-intro-sockets.js
new file mode 100644
index 0000000..473f8d1
--- /dev/null
+++ b/08-realtime/05-websockets/01-intro-sockets/01-intro-sockets.js
@@ -0,0 +1,12 @@
+'use strict';
+
+const WebSocket = require(`ws`);
+
+const PORT = 8080;
+const {Server} = WebSocket;
+const server = new Server({ port: PORT });
+
+server.on(`connection`, (ws, req) => {
+    const {remoteAddress} = req.socket;
+    ws.send(`Привет, странник. Твой ip: ${remoteAddress}`);
+});
diff --git a/08-realtime/05-websockets/01-intro-sockets/index.html b/08-realtime/05-websockets/01-intro-sockets/index.html
new file mode 100644
index 0000000..a1ee896
--- /dev/null
+++ b/08-realtime/05-websockets/01-intro-sockets/index.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<html lang="ru">
+<head>
+    <title>WebSocket</title>
+    <meta charset="utf-8" />
+</head>
+<body>
+    <h1>-</h1>
+    <h3>Статус подключения: <span>Нет соединения</span></h3>
+    <script>
+      const TIMEOUT = 2000;
+      const titleElement = document.querySelector(`h1`);
+      const statusElement = document.querySelector(`span`);
+
+      setTimeout(() => {
+
+        const ws = new WebSocket(`ws://localhost:8080`);
+
+        ws.addEventListener(`message`, (evt) => {
+          const {data} = evt;
+          titleElement.textContent = data;
+        });
+
+        ws.addEventListener(`open`, () => {
+          statusElement.textContent = `Подключено`;  
+        });
+
+        ws.addEventListener(`close`, () => {
+          statusElement.textContent = `Отключен`;
+        });
+
+
+      }, TIMEOUT);
+
+    </script>
+</body>
+</html>
diff --git a/08-realtime/05-websockets/01-intro-sockets/package-lock.json b/08-realtime/05-websockets/01-intro-sockets/package-lock.json
new file mode 100644
index 0000000..e3ec98d
--- /dev/null
+++ b/08-realtime/05-websockets/01-intro-sockets/package-lock.json
@@ -0,0 +1,13 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "ws": {
+      "version": "7.3.1",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.3.1.tgz",
+      "integrity": "sha512-D3RuNkynyHmEJIpD2qrgVkc9DQ23OrN/moAwZX4L8DfvszsJxpjQuUq3LMx6HoYji9fbIOBY18XWBsAux1ZZUA=="
+    }
+  }
+}
diff --git a/08-realtime/05-websockets/01-intro-sockets/package.json b/08-realtime/05-websockets/01-intro-sockets/package.json
new file mode 100644
index 0000000..89477a4
--- /dev/null
+++ b/08-realtime/05-websockets/01-intro-sockets/package.json
@@ -0,0 +1,15 @@
+{
+  "name": "samples",
+  "version": "1.0.0",
+  "description": "",
+  "main": "01-intro-sockets.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "ws": "7.3.1"
+  }
+}
diff --git a/08-realtime/05-websockets/02-chat/02-chat.js b/08-realtime/05-websockets/02-chat/02-chat.js
new file mode 100644
index 0000000..0cc5e81
--- /dev/null
+++ b/08-realtime/05-websockets/02-chat/02-chat.js
@@ -0,0 +1,40 @@
+'use strict';
+
+const WebSocket = require(`ws`);
+const express = require(`express`);
+const path = require(`path`);
+const http = require(`http`);
+
+const PORT = 4000;
+
+const app = express();
+const server = http.createServer(app);
+const ws = new WebSocket.Server({ server });
+
+app.get(`/`, async (req, res) => {
+    res.sendFile(path.resolve(__dirname, `index.html`));
+});
+
+ws.on(`connection`, (socket, req) => {
+    const {remoteAddress: ip} = req.socket;
+    console.log(`Новое подключение: ${ip}`);
+
+    socket.on(`message`, (clientMessage) => {
+        console.log(`> ${clientMessage}`);
+        ws.clients.forEach((client) => {
+            if (client.readyState === WebSocket.OPEN && client !== socket) {
+                client.send(clientMessage);
+            }
+        })
+    });
+
+    socket.on(`close`, () => {
+        console.log(`Клиент отключён: ${ip}`);
+    });
+
+    socket.send(`[Server]: Добро пожаловать в чат.`);
+});
+
+server.listen(PORT, () => {
+    console.log(`Ожидаю подключений на порт ${PORT}`)
+});
diff --git a/08-realtime/05-websockets/02-chat/index.html b/08-realtime/05-websockets/02-chat/index.html
new file mode 100644
index 0000000..4573592
--- /dev/null
+++ b/08-realtime/05-websockets/02-chat/index.html
@@ -0,0 +1,102 @@
+<!DOCTYPE html>
+<html lang="ru">
+<head>
+    <title>WebSocket</title>
+    <meta charset="utf-8" />
+</head>
+<style>
+  form {
+    display: flex;
+    flex-direction: column;
+    flex-wrap: wrap;
+    justify-content: center;
+    width: 300px;
+  }
+
+  label {
+    font-weight: bold;
+    padding: 8px 0;
+  }
+
+  input {
+    padding: 10px;
+    width: 100%;
+  }
+
+  button {
+    padding: 10px;
+    margin-top: 15px;
+  }
+</style>
+<body>
+    <h1>Чат (<span class="status">Нет соединения</span>)</h1>
+    <form class="chat-form">
+      <label>Имя:
+        <input class="chat-form__username" />
+      </label>
+      <label>Сообщение:
+        <input class="chat-form__message" />
+      </label>
+      <button class="chat-form__send-button" type="submit">Отправить</button>
+    </form>
+
+    <h2>Сообщения:</h2>
+    <ul class="chat"></ul>
+
+    <script>
+
+      const ReadyState = {
+        CONNECTING: 0,
+        OPEN: 1,
+        CLOSING: 2,
+        CLOSED: 3,
+      }
+
+      const statusElement = document.querySelector(`.status`);
+      const chatFormElement = document.querySelector(`.chat-form`);
+      const messageElement = chatFormElement.querySelector(`.chat-form__message`);
+      const usernameElement = chatFormElement.querySelector(`.chat-form__username`);
+      const chatElement = document.querySelector(`.chat`);
+
+      const ws = new WebSocket(`ws://localhost:4000`);
+
+      const addMessage = (message) => {
+        const newMessageElement = document.createElement(`li`);
+        newMessageElement.textContent = message;
+        chatElement.appendChild(newMessageElement);
+      }
+
+      chatFormElement.addEventListener(`submit`, (evt) => {
+        evt.preventDefault();
+
+        const {value: newMessage} = messageElement;
+        const {value: username} = usernameElement;
+        const message = `[${username}]: ${newMessage}`;
+
+        messageElement.value = ``;
+        messageElement.focus();
+
+        if (ws.readyState !== ReadyState.OPEN) {
+          alert(`Соединение с сервером прервано. Обновите страницу.`);
+          return;
+        }
+
+        addMessage(message);
+        ws.send(message);
+      });
+
+      ws.addEventListener(`message`, (evt) => {
+        const {data} = evt;
+        addMessage(`${data}`);
+      });
+
+      ws.addEventListener(`open`, () => {
+        statusElement.textContent = `Подключено`;  
+      });
+
+      ws.addEventListener(`close`, () => {
+        statusElement.textContent = `Отключён`;
+      });
+    </script>
+</body>
+</html>
diff --git a/08-realtime/06-socket.io/01-chat/01-chat.js b/08-realtime/06-socket.io/01-chat/01-chat.js
new file mode 100644
index 0000000..0da7fca
--- /dev/null
+++ b/08-realtime/06-socket.io/01-chat/01-chat.js
@@ -0,0 +1,34 @@
+'use strict';
+
+const express = require(`express`);
+const path = require(`path`);
+const http = require(`http`);
+
+const PORT = 4000;
+
+const app = express();
+const server = http.createServer(app);
+const io = require('socket.io')(server);
+
+app.get(`/`, async (req, res) => {
+    res.sendFile(path.resolve(__dirname, `index.html`));
+});
+
+io.on(`connection`, (socket) => {
+    const {address: ip} = socket.handshake;
+    console.log(`Новое подключение: ${ip}`);
+
+    socket.on(`message`, (clientMessage) => {
+        socket.broadcast.emit(`message`, clientMessage);
+    });
+
+    socket.on(`disconnect`, () => {
+        console.log(`Клиент отключён: ${ip}`);
+    });
+
+    socket.send(`[Server]: Добро пожаловать в чат.`);
+});
+
+server.listen(PORT, () => {
+    console.log(`Ожидаю подключений на порт ${PORT}`)
+});
diff --git a/08-realtime/06-socket.io/01-chat/index.html b/08-realtime/06-socket.io/01-chat/index.html
new file mode 100644
index 0000000..82c2cab
--- /dev/null
+++ b/08-realtime/06-socket.io/01-chat/index.html
@@ -0,0 +1,94 @@
+<!DOCTYPE html>
+<html lang="ru">
+<head>
+    <title>WebSocket</title>
+    <meta charset="utf-8" />
+</head>
+<style>
+  form {
+    display: flex;
+    flex-direction: column;
+    flex-wrap: wrap;
+    justify-content: center;
+    width: 300px;
+  }
+
+  label {
+    font-weight: bold;
+    padding: 8px 0;
+  }
+
+  input {
+    padding: 10px;
+    width: 100%;
+  }
+
+  button {
+    padding: 10px;
+    margin-top: 15px;
+  }
+</style>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.3.0/socket.io.js"></script>
+<body>
+    <h1>Чат (<span class="status">Нет соединения</span>)</h1>
+    <form class="chat-form">
+      <label>Имя:
+        <input class="chat-form__username" />
+      </label>
+      <label>Сообщение:
+        <input class="chat-form__message" />
+      </label>
+      <button class="chat-form__send-button" type="submit">Отправить</button>
+    </form>
+
+    <h2>Сообщения:</h2>
+    <ul class="chat"></ul>
+
+    <script>
+      const statusElement = document.querySelector(`.status`);
+      const chatFormElement = document.querySelector(`.chat-form`);
+      const messageElement = chatFormElement.querySelector(`.chat-form__message`);
+      const usernameElement = chatFormElement.querySelector(`.chat-form__username`);
+      const chatElement = document.querySelector(`.chat`);
+
+      const socket = io('http://localhost:4000/');
+
+      const addMessage = (message) => {
+        const newMessageElement = document.createElement(`li`);
+        newMessageElement.textContent = message;
+        chatElement.appendChild(newMessageElement);
+      }
+
+      chatFormElement.addEventListener(`submit`, (evt) => {
+        evt.preventDefault();
+
+        const {value: newMessage} = messageElement;
+        const {value: username} = usernameElement;
+        const message = `[${username}]: ${newMessage}`;
+
+        messageElement.value = ``;
+        messageElement.focus();
+
+        if (!socket.connected) {
+          alert(`Соединение с сервером прервано. Обновите страницу.`);
+          return;
+        }
+
+        socket.emit(`message`, message);
+        addMessage(message);
+      });
+
+      socket.addEventListener(`message`, (message) => {
+        addMessage(`${message}`);
+      });
+
+      socket.addEventListener(`connect`, () => {
+        statusElement.textContent = `Подключено`;  
+      });
+
+      socket.addEventListener(`disconnect`, () => {
+        statusElement.textContent = `Отключён`;
+      });
+    </script>
+</body>
+</html>
diff --git a/09-deploy/01-chat/.gitignore b/09-deploy/01-chat/.gitignore
new file mode 100644
index 0000000..3c53898
--- /dev/null
+++ b/09-deploy/01-chat/.gitignore
@@ -0,0 +1,10 @@
+.idea
+.DS_Store
+node_modules
+npm-debug.log
+Thumbs.db
+todo.md
+yarn.lock
+.vscode/
+build/
+release/
diff --git a/09-deploy/01-chat/app.js b/09-deploy/01-chat/app.js
new file mode 100644
index 0000000..e640f07
--- /dev/null
+++ b/09-deploy/01-chat/app.js
@@ -0,0 +1,34 @@
+'use strict';
+
+const express = require(`express`);
+const path = require(`path`);
+const http = require(`http`);
+
+const PORT = process.env.PORT || 4000;
+
+const app = express();
+const server = http.createServer(app);
+const io = require('socket.io')(server);
+
+app.get(`/`, async (req, res) => {
+  res.sendFile(path.resolve(__dirname, `index.html`));
+});
+
+io.on(`connection`, (socket) => {
+  const {address: ip} = socket.handshake;
+  console.log(`Новое подключение: ${ip}`);
+
+  socket.on(`message`, (clientMessage) => {
+      socket.broadcast.emit(`message`, clientMessage);
+  });
+
+  socket.on(`disconnect`, () => {
+      console.log(`Клиент отключён: ${ip}`);
+  });
+
+  socket.send(`[Server]: Добро пожаловать в чат.`);
+});
+
+server.listen(PORT, () => {
+  console.log(`Ожидаю подключений на порт ${PORT}`)
+});
diff --git a/09-deploy/01-chat/ecosystem.config.js b/09-deploy/01-chat/ecosystem.config.js
new file mode 100644
index 0000000..f1aa8cd
--- /dev/null
+++ b/09-deploy/01-chat/ecosystem.config.js
@@ -0,0 +1,12 @@
+module.exports = {
+  apps : [{
+    script: 'app.js',
+    name: 'chat',
+    watch: true,
+    env: {
+        PORT: 4444,
+    },
+    max_memory_restart: '12M',
+    exec_mode: 'fork'
+  }],
+};
diff --git a/09-deploy/01-chat/index.html b/09-deploy/01-chat/index.html
new file mode 100644
index 0000000..ef0fbab
--- /dev/null
+++ b/09-deploy/01-chat/index.html
@@ -0,0 +1,94 @@
+<!DOCTYPE html>
+<html lang="ru">
+<head>
+    <title>WebSocket</title>
+    <meta charset="utf-8" />
+</head>
+<style>
+  form {
+    display: flex;
+    flex-direction: column;
+    flex-wrap: wrap;
+    justify-content: center;
+    width: 300px;
+  }
+
+  label {
+    font-weight: bold;
+    padding: 8px 0;
+  }
+
+  input {
+    padding: 10px;
+    width: 100%;
+  }
+
+  button {
+    padding: 10px;
+    margin-top: 15px;
+  }
+</style>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.3.0/socket.io.js"></script>
+<body>
+    <h1>Чат (<span class="status">Нет соединения</span>)</h1>
+    <form class="chat-form">
+      <label>Имя:
+        <input class="chat-form__username" />
+      </label>
+      <label>Сообщение:
+        <input class="chat-form__message" />
+      </label>
+      <button class="chat-form__send-button" type="submit">Отправить</button>
+    </form>
+
+    <h2>Сообщения:</h2>
+    <ul class="chat"></ul>
+
+    <script>
+      const statusElement = document.querySelector(`.status`);
+      const chatFormElement = document.querySelector(`.chat-form`);
+      const messageElement = chatFormElement.querySelector(`.chat-form__message`);
+      const usernameElement = chatFormElement.querySelector(`.chat-form__username`);
+      const chatElement = document.querySelector(`.chat`);
+
+      const socket = io();
+
+      const addMessage = (message) => {
+        const newMessageElement = document.createElement(`li`);
+        newMessageElement.textContent = message;
+        chatElement.appendChild(newMessageElement);
+      }
+
+      chatFormElement.addEventListener(`submit`, (evt) => {
+        evt.preventDefault();
+
+        const {value: newMessage} = messageElement;
+        const {value: username} = usernameElement;
+        const message = `[${username}]: ${newMessage}`;
+
+        messageElement.value = ``;
+        messageElement.focus();
+
+        if (!socket.connected) {
+          alert(`Соединение с сервером прервано. Обновите страницу.`);
+          return;
+        }
+
+        socket.emit(`message`, message);
+        addMessage(message);
+      });
+
+      socket.addEventListener(`message`, (message) => {
+        addMessage(`${message}`);
+      });
+
+      socket.addEventListener(`connect`, () => {
+        statusElement.textContent = `Подключено`;  
+      });
+
+      socket.addEventListener(`disconnect`, () => {
+        statusElement.textContent = `Отключён`;
+      });
+    </script>
+</body>
+</html>
diff --git a/09-deploy/01-chat/package-lock.json b/09-deploy/01-chat/package-lock.json
new file mode 100644
index 0000000..309e9d6
--- /dev/null
+++ b/09-deploy/01-chat/package-lock.json
@@ -0,0 +1,711 @@
+{
+  "name": "chat",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "accepts": {
+      "version": "1.3.7",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
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+      "requires": {
+        "mime-types": "~2.1.24",
+        "negotiator": "0.6.2"
+      }
+    },
+    "after": {
+      "version": "0.8.2",
+      "resolved": "https://registry.npmjs.org/after/-/after-0.8.2.tgz",
+      "integrity": "sha1-/ts5T58OAqqXaOcCvaI7UF+ufh8="
+    },
+    "array-flatten": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
+      "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
+    },
+    "arraybuffer.slice": {
+      "version": "0.0.7",
+      "resolved": "https://registry.npmjs.org/arraybuffer.slice/-/arraybuffer.slice-0.0.7.tgz",
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diff --git a/09-deploy/01-chat/package.json b/09-deploy/01-chat/package.json
new file mode 100644
index 0000000..adf2cf7
--- /dev/null
+++ b/09-deploy/01-chat/package.json
@@ -0,0 +1,17 @@
+{
+  "name": "chat",
+  "version": "1.0.0",
+  "description": "Simple socket.io chat",
+  "main": "app.js",
+  "scripts": {
+    "start": "node app.js",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "4.17.1",
+    "socket.io": "2.3.0"
+  }
+}
diff --git a/README.md b/README.md
index 8a13e4e..b5c4de7 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,3 @@
-# tutorial-demos
-Примеры кода из учебника
+# Демонстрации
+
+Исходники примеров для курса «[Node.js. Разработка серверов приложений и API](https://htmlacademy.ru/intensive/nodejs)»