How to build a spring boot container in Cloud build

Set-up your repository, and then set-up your project to use a trigger (in cloud build). Choose the option:

Cloud Build configuration file (yaml or json)
Specify the path to a Cloud Build configuration file

Then update cloudbuild.yaml:

  args: ['build', '--tag=gcr.io/<project>/<container>', '.']
images: ['gcr.io/<project>/<container>']

With your project and container name.