Sri Ramkrishna commented on a discussion:
Yep, in fact that is the registry I'm using, but I had to put in all my pre-requisites using buildah. I'm willing to do the work to do docker because I dont think I have a choice - the reason being that if I want to test against the main branch of gnome-shell instead of the fedora version then I'm going to have to invest in some time building a full container that can launch gnome-shell headless.