http://dl-cdn.alpinelinux.org/alpine/edge/testing
Please note I did oversimplify this a bit. You'll still need something like WayVNC, but it doesn't have WebSocket support yet. You can track it here:
https://github.com/any1/neatvnc/issues/2
In the meantime, you should be able to use websockify (there is an alpine package already).
For a simple app, I'd recommend cage which is a kiosk wayland WM for a single app:
https://pkgs.alpinelinux.org/package/edge/community/x86_64/c...
Here is an example for Sway that you could use for Cage as well:
https://github.com/any1/wayvnc/blob/master/FAQ.md