IIRC Henri created the TeX Live DH account, and at almost the same time Ben came up the images to build our documentation. At some point, Henri saw potential in our images, and then we got the maintenance. :) I might ping hmenke to help me. :) Ben Frank is probably unavailable this weekend, I guess. :)
I am a complete newbie with Docker images. To be honest, I think I tested a TeX Live image once for some reason. I don't even had a decent broadband. :)
Not a problem. It may not make sense to pursue this now if your pipelines are already full and your target audience are CI services, but I will dump what I know into the issue and we'll see. Worst-case scenario: we will have a pretty good tutorial for whoever wants to build their own texlive images on strange architectures.
hmenke: Hello, I remember citing your TUGboat paper about using LPEG to build parsers in Lua(TeX). Great work. 🙂 It seems I will be citing you again when I get to write a follow-up article about adding Docker support to the Markdown LaTeX package.