chore: Fix GAE Exec entrypoint when run on GitHub Actions
chore: Fix GAE Exec entrypoint when run on GitHub Actions

dazuma/ruby-docker,GoogleCloudPlatform/ruby-docker,dazuma/ruby-docker,GoogleCloudPlatform/ruby-docker,dazuma/ruby-docker,GoogleCloudPlatform/ruby-docker,dazuma/ruby-docker,GoogleCloudPlatform/ruby-docker