without specifying registry details for `image` value, You will get following error if you are using a private registry even when your private images are hosted in docker.hub and you have valid credentials configured for the same.
Failed to pull image "xxx/xxx-app:0.0.1": rpc error: code = Unknown desc = Error response from daemon: pull access denied for xxx/xxx-app, repository does not exist or may require 'docker login'
Raja Anbazhagan
8b2b09e61c