GitHub Actions: Delete untagged images

TIL of a GitHub action that deletes untagged images from the container registry. Using CI workflows you can end up with a lot of untagged images in your registry. Here is a snippet of how to clean those up after a successful build.

  - uses: actions/delete-package-versions@v5
    with:
      package-name: $
      package-type: 'container'
      min-versions-to-keep: 10
      delete-only-untagged-versions: 'true'

Tweak to your liking. The package-name value depends on how your name your image. Most of my repos that produce an image produce one. I name it the same as the repo.

Look at the GitHub action docs for more info.