There’s a download link on the page I linked, I don’t think they have a container version available, it’ll have to be installed manually.

I run mine on a LXC dedicated for that application and time it to boot before the rest of the docker servers.

If you deploy it as a container you could end up with a chicken and egg situation.

This may be overkill for most use cases but you can use jcr.

The best reason to use it in my book is the garbage collection as the official registry doesn’t have that feature and can and will bloat over time.