Oops. Hydra, the OAuth2 backend I'm using, quietly upgraded itself at some point, and that broke login. Fixed now (clearly, or I couldn't post).

Lesson learned: Use a specific version tag on containers (not :latest, or no tag).

Not that expensive a lesson this time at least.

Also, if any of you are keeping track, I got the "Source Dragon of Motion" from Lego (well, from Smyths and saved £20 or so)