edit jenkins

Jenkinsfile

 pipeline {
-    agent {
-        docker {
-            image 'node:6-alpine'
-            args '-p 3000:3000 -p 5000:5000'
-        }
-    }
+    agent any
     environment {
         CI = 'true'
     }
@@ -26,15 +21,7 @@ Rollback:【回滚】''',
         )
     }
     stages {
-        stage('Build dev') {
-            when {
-                branch 'developer' 
-            }
-            steps {
-                sh 'npm install'
-            }
-        }
-        stage('Build master') {
+        stage('checkout') {
             when {
                 branch 'master' 
             }
@@ -49,16 +36,39 @@ Rollback:【回滚】''',
                         sh "git checkout $DeployVersion"
                     }
                 }
+            }
+        }
+        stage('Build') {
+            agent {
+                docker {
+                    image 'node:6-alpine'
+                    args '-p 3000:3000 -p 5000:5000'
+                }
+            }
+            steps {
                 sh 'npm install'
             }
         }
+
         stage('Test') {
+            agent {
+                docker {
+                    image 'node:6-alpine'
+                    args '-p 3000:3000 -p 5000:5000'
+                }
+            }
             steps {
                 sh 'echo "testing!"'
                 echo "test complete!"
             }
         }
         stage('Deliver for development') {
+            agent {
+                docker {
+                    image 'node:6-alpine'
+                    args '-p 3000:3000 -p 5000:5000'
+                }
+            }
             when {
                 branch 'developer' 
             }
@@ -69,6 +79,12 @@ Rollback:【回滚】''',
             }
         }
         stage('Deploy for production') {
+            agent {
+                docker {
+                    image 'node:6-alpine'
+                    args '-p 3000:3000 -p 5000:5000'
+                }
+            }
             when {
                 branch 'master'  
             }

src/App.js

@@ -11,7 +11,7 @@ class App extends Component {
           <h1 className="App-title">Welcome to React</h1>
         </header>
         <p className="App-intro">
-          To get started, edit <code>src/App.js</code> and save to reload. We are in developer right now!
+          To get started, edit <code>src/App.js</code> and save to reload. We are in master right now!
         </p>
       </div>
     );