We run a copy locally, but there's not one that's publicly accessible yet as it's still too early (e.g. right now work is being done related to login). I've only played with the one that's directly accessible on our intranet, and right now I don't even know if there's a docker for it as I'm not too directly involved in the project.
RE: 2nd update of 2024: Releasing the new HAF-based stack for Hive API nodes