The release phase enables certain tasks to be run before a new release of an app is deployed. The release phase can be useful for tasks such as: Sending CSS, JS, and other assets from the app’s slug to a CDN or S3 bucket Priming or invalidating cache stores Running database schema migrations If a release phase task fails, the new release is not deployed, leaving the current release unaffected. Whe
![Release Phase (Beta) | Heroku Dev Center](https://cdn-ak-scissors.b.st-hatena.com/image/square/a1b2a24fb8bb6b5daa830ba9854ce4ba0af7b021/height=288;version=1;width=512/https%3A%2F%2Fwww.herokucdn.com%2Fimages%2Fog.png)