Reduce storage requirements

On 2022-09-06 I was notified by email of upcoming changes to the GitLab SaaS Free Tier. One of those changes is the introduction of a 5GB storage limit on top-level namespaces. That includes personal namespaces. So this project's storage count towards that 5GB limit.

Checking storage usage for this project, I found 30.3GiB used by the container registry and 20.4MiB combined for everything else. That is well over the 5GB limit and would prevent me from doing much, if anything, in my own personal namespace after the change goes into effect.

Moving this project to a namespace of its own is no solution. The project all by itself already exceeds the limit. The only viable solution will be to remove images from the container registry.

Introduce a periodic clean up policy to remove old tags and review if there are images that can be dropped. If, after these actions, this project's storage still consumes a large chunk of my personal namespace, consider moving it to a namespace of its own.
# Projects with tags in their container registry cannot be moved.