I'm updating some blubberised repos that a colleague of mine created some time ago and I'm not sure what base images from the Docker registry are the best to use.

For instance, one repo uses docker-registry.wikimedia.org/wikimedia-buster as base image in .pipeline/blubber.yaml. I thought I'd update to Bookworm as the newest stable Debian release, but there is no image "wikimedia-bookworm", only "bookworm". I'd like to know what's different in the the ones with the wikimedia- prefix.

There are also several different ones for Python, e.g. "python3", "python3-buster" and "python3-build-buster".

Is there documentation somewhere or links to repos where I can see what Docker or Blubber files were used to create them?