fix: use yarn and add deliver

Author: rezonjov

Jenkinsfile

@@ -1,25 +1,29 @@
 pipeline {
     agent {
         docker {
-            image 'node:6-alpine' 
-            args '-p 3000:3000' 
+            image 'node:6-alpine'
+            args '-p 3000:3000'
         }
     }
-
-     environment {
+    environment { 
         CI = 'true'
     }
-
     stages {
-        stage('Build') { 
+        stage('Build') {
             steps {
-                sh 'npm install' 
+                sh 'yarn'
             }
         }
-        
-        stage('Test') { 
+        stage('Test') {
             steps {
-                sh './jenkins/scripts/test.sh' 
+                sh './jenkins/scripts/test.sh'
+            }
+        }
+        stage('Deliver') { 
+            steps {
+                sh './jenkins/scripts/deliver.sh' 
+                input message: 'Finished using the web site? (Click "Proceed" to continue)' 
+                sh './jenkins/scripts/kill.sh' 
             }
         }
     }