Jenkins scripted multibranch pipeline

Jenkinsfile

@@ -1,29 +1,48 @@
-node {
-  def app
+pipeline {
+  agent any
 
-/*  stage('Clone repository') {
-      sh '/usr/bin/env'
-      checkout scm
-  }*/
-
-  stage('Build image') {
-    sh '/usr/bin/env'
-    /* Multi-Branch Pipeline works with env.BRANCH_NAME*/
-    app = docker.build("sos-milter:${env.BRANCH_NAME}","--pull --label BUILD_URL=${env.BUILD_URL} .")
+  environment {
+    dockerImage = ''
   }
 
+  parameters {
+    string name: 'dockerRegistry', trim: true
+  }
+
+  stages {
+    stage('Build image') {
+      steps {
+        sh '/usr/bin/env'
+        script {
+          /* Multi-Branch Pipeline works with env.BRANCH_NAME*/
+          dockerImage = docker.build("sos-milter:${env.BRANCH_NAME}","--pull --label BUILD_URL=${env.BUILD_URL} .")
+        }
+      }
+    }
     stage('Test image') {
-    app.inside {
+      steps {
+        script {
+          dockerImage.inside {
             sh '/usr/bin/env'
             sh '/bin/ps auxwwf'
           }
         }
-
-  stage('Push image') {
-    app.push()
       }
-
+    }
+    stage('Push image') {
+      steps {
+        script {
+          docker.withRegistry(env.dockerRegistry) {
+            dockerImage.push()
+          }
+        }
+      }
+    }
     stage('Cleanup') {
+      steps {
         sh 'echo "TODO: cleanup!"'
       }
+    }
+  }
 }
+