mutter based compositor for kiosks

 GNOME Kiosk provides a desktop environment suitable for fixed purpose, or
 single application deployments like wall displays and point-of-sale systems.
 .
 It provides a very minimal wayland display server and compositor and Xorg
 compositor and window manager. It automatically starts applications fullscreen.
 .
 Notably, GNOME Kiosk features no panels, dashes, or docks that could distract
 from the application using it as a platform.