Add Test stage

Author: fahernkhan

Jenkinsfile

@@ -1,12 +1,20 @@
-node {
-    stage('Build') {
-        docker.image('node:16-buster-slim').withRun('-p 3000:3000') {
-            sh 'npm install'
+pipeline {
+    agent {
+        docker {
+            image 'node:16-buster-slim'
+            args '-p 3000:3000'
         }
     }
-    stage('Test') {
-        docker.image('node:16-buster-slim').inside('-p 3000:3000') {
-            sh './jenkins/scripts/test.sh'
+    stages {
+        stage('Build') {
+            steps {
+                sh 'npm install'
+            }
+        }
+        stage('Test') { 
+            steps {
+                sh './jenkins/scripts/test.sh' 
+            }
         }
     }
-}
+}