This sample is used as part of the Quickstart for Java in the App Engine Flexible Environment
Use either:
gcloud initgcloud beta auth application-default login
$ mvn clean jetty:run-exploded
$ mvn appengine:deploy
$ gradle jettyRun
If you do not have gradle installed, you can run using ./gradlew appengineRun.
$ gradle appengineDeploy
If you do not have gradle installed, you can deploy using ./gradlew appengineDeploy.