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Pushing images to Container Registry no longer creates a release
Change effective on 29 May 2018
Pushing images to Container Registry, either via the heroku container:push CLI command or using docker push, no longer releases those images to your application.
To create a new release using the images pushed to Container Registry, run heroku container:release (specifying the process types you would like to release).
Separating push and release allows you to:
- Push several images and then release them all at the same time.
- Use the release phase feature (run tasks before a new release of your app is deployed).
- Push one image and release it to multiple process types with different CMDs, via heroku.yml or API.
This change in behavior was announced on May 15th.