steps:
- name: "gcr.io/cloud-builders/gcloud"
  args: ["app", "deploy"]
timeout: "1600s"

steps:
- name: "gcr.io/cloud-builders/mvn"
  args: ["package", "appengine:deploy"]
timeout: "1600s"

Use mvn package appengine:deploy instead of gcloud
Use mvn package appengine:deploy instead of gcloud

This PR updates the cloudbuild.yaml to use maven instead.

Cite:
- https://groups.google.com/d/msg/google-appengine/arpnkSixFlM/IR5ATrvvBAAJ
- https://cloud.google.com/appengine/docs/standard/java/tools/uploadinganapp#using_maven_recommended
- https://cloud.google.com/artifact-registry/docs/configure-cloud-build#maven