add initial Jenkinsfile

Jenkinsfile

@@ -0,0 +1,36 @@
+node {
+    def app
+
+    stage('Clone repository') {
+        /* Let's make sure we have the repository cloned to our workspace */
+
+        checkout scm
+    }
+
+    stage('Build image') {
+        /* This builds the actual image; synonymous to
+         * docker build on the command line */
+
+        app = docker.build("getintodevops/hellonode")
+    }
+
+    stage('Test image') {
+        /* Ideally, we would run a test framework against our image.
+         * For this example, we're using a Volkswagen-type approach ;-) */
+
+        app.inside {
+            sh 'echo "Tests passed"'
+        }
+    }
+
+    stage('Push image') {
+        /* Finally, we'll push the image with two tags:
+         * First, the incremental build number from Jenkins
+         * Second, the 'latest' tag.
+         * Pushing multiple tags is cheap, as all the layers are reused. */
+        docker.withRegistry('https://harbor.lan', 'jenkins-harbor') {
+            app.push("${env.BUILD_NUMBER}")
+            app.push("latest")
+        }
+    }
+}