Install Wayland in Ubuntu: https://askubuntu.com/questions/832509/how-to-install-wayland-on-ubuntu-16-04-lts
Start X applications in a container: https://blog.simos.info/how-to-run-graphics-accelerated-gui-apps-in-lxd-containers-on-your-ubuntu-desktop/
Wayland in container: https://unix.stackexchange.com/questions/330366/how-can-i-run-a-graphical-application-in-a-container-under-wayland/359244#359244