> Although, I think about publishing the core of it as a package, fully fledged alternative to noVNC. Where X server desktop can be shared using WebRTC technology to a browser.

I think that would be nice! There are a lot of ways to approach this (I've used xpra, vnc, remote X, xrdp...) and there are pros/cons to them all. It might be useful for more people without the docker requirement :)