The app.yaml file must be located in your application's root directory. You may check this detail and general app.yaml-related information on the "Configuring your App with app.yaml" documentation page <https://cloud.google.com/appengine/docs/flexible/python/configuring-your-app-with-app-yaml#intro>. This means that the ./config/dev/ directory, where app.yaml is saved, must be regarded as the root directory: you should copy all your app's other directories and files accordingly, to dev, from your home directory, or where stored initially. Once this file copy succeeds, and your app directories are placed under the root "dev" directory, the "gcloud app deploy ./config/dev/app.yaml" command should succeed, as expected.
Depending what your services entail, you might use the "service: service_name" settings in app.yaml. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-appengine+unsubscr...@googlegroups.com. To post to this group, send email to email@example.com. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/22beaa20-398d-4879-b1bc-84704a10922b%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.