That error message usually points out that your application starting a
webserver and handling requests correctly [1]. There is an example on how
to deploy a Springboot application for Google App Engine Java 11 runtime
here [2] (the repository is here [3]). I'd strongly advise you to check [2]
You are right. As advised on the product description for App Engine
Standard [1] you are just basically deploying an application into
container instances running on Google's infrastructure.
In the specific case of App Engine Flexible you can even define your own
Dockerfile [2] for a custom
The environment variables defined on the cloudbuild.yaml file will be
available within the instances running your Cloud Build steps. For the
variables to persist on your App Engine application and be used at runtime
they'd need to be defined on the app.yaml file. So, as explained on this
