Test environments, stages, post

Jenkinsfile

@@ -1,10 +1,38 @@
 pipeline {
-    agent { docker { image 'node:6.3' } }
+    agent { 
+        docker { image 'node:10.13' } 
+    }
+
+    environment {
+        DISABLE_AUTH = 'true'
+        DB_ENGINE    = 'sqlite'
+    }
+
     stages {
         stage('build') {
             steps {
                 sh 'npm --version'
+                sh 'printenv'
             }
         }
     }
+
+    post {
+        always {
+            echo 'This will always run'
+        }
+        success {
+            echo 'This will run only if successful'
+        }
+        failure {
+            echo 'This will run only if failed'
+        }
+        unstable {
+            echo 'This will run only if the run was marked as unstable'
+        }
+        changed {
+            echo 'This will run only if the state of the Pipeline has changed'
+            echo 'For example, if the Pipeline was previously failing but is now successful'
+        }
+    }
 }