Your response feels in bad faith. Docker is the default registery. That gives them n amount of responsibility. Not to mention organizations should be accountable for their bad behavior. Don't give them a pass.
I would love to make the source available. But there's no getting that genie back in the bottle once you go that route. I wanted to release it and get some feedback before deciding what to do with it. That said, a server that supports the examples on this page is pretty trivial to implement (especially if you skip the pubsub stuff). I had a working prototype in a weekend. Multiple implementations would probably be a good thing.
EDIT: also, the current state of the code base is not something I'd be excited about having my name attached to ;)
You can think about releasing the code with no license or with some form of the newer BSL or something.
It won't stop bad actors from stealing your code and using it but you will stop most corporate actors from touching it (and they are the ones you'd want to pay in the future anyway).
Here's the extra poor man's version to get ya'll started. It doesn't have any of the auth/rate limiting/etc or pubsub, but it should basically work for the MPMC queue stuff:
I made a similar project when starting to learn Go. It's opensource and it works. Just don't host it out on the internet. Intranet should be good because no security audit has happened. This was sort of an MVP