Update Jenkinsfile

Add build url to fail e-mail message

Author: ArtikUA

jenkinsfile-examples/nodejs-build-test-deploy-docker-notify/Jenkinsfile

@@ -77,7 +77,7 @@ node('node') {
 
         currentBuild.result = "FAILURE"
 
-            mail body: "project build error: ${err}" ,
+            mail body: "project build error is here: ${env.BUILD_URL}" ,
             from: '[email protected]',
             replyTo: '[email protected]',
             subject: 'project build failed',