Add project 21 to 23

Author: velopert

18/learn-middleware/src/containers/SampleContainer.js

@@ -25,7 +25,7 @@ const SampleContainer = ({
       }
     };
     fn();
-  }, []);
+  }, [getPost, getUsers]);
   return (
     <Sample
       post={post}

21/blog/blog-backend/.eslintrc.json

@@ -0,0 +1,19 @@
+{
+  "env": {
+    "commonjs": true,
+    "es6": true,
+    "node": true
+  },
+  "extends": ["eslint:recommended", "prettier"],
+  "globals": {
+    "Atomics": "readonly",
+    "SharedArrayBuffer": "readonly"
+  },
+  "parserOptions": {
+    "ecmaVersion": 2018
+  },
+  "rules": {
+    "no-unused-vars": "warn",
+    "no-console": "off"
+  }
+}

21/blog/blog-backend/.prettierrc

@@ -0,0 +1,8 @@
+{
+  "singleQuote": true,
+  "semi": true,
+  "useTabs": false,
+  "tabWidth": 2,
+  "trailingComma": "all",
+  "printWidth": 80
+}