You can now fetch release notes, changelogs and commit history for Docker update pull requests with Dependabot. This will allow you to quickly evaluate the stability risk of the dependency upgrade. To enable support, add the org.opencontainers.image.source label to the Dockerfile with the URL of the source repository. Additionally, the repository should be tagged with the same tags as the published Docker images. This allows Dependabot to understand which repo and commit is associated each version/tag of a Docker image. Here's an example repository demonstrating this setup.
Did you know? Dependabot's internal library for identifying dependency updates is open source. If you notice a Dependabot pull request is missing metadata, you can leverage the transparency of open source to debug the root cause – for example, if the package maintainer needs to fix their metadata annotation.