request container image on ghcr

[bonjour-py]

Docker Hub is unavailable in certain locations.
need container image in ghcr （github packages） or somewhere else

[antonc42]

This is even more relevant since April 1, 2025 when Docker Hub lowered its rate limits.
Unauthenticated pulls: 100 per 6 hours

https://docs.docker.com/docker-hub/usage/

Wayback Machine mirror since above page appears to be down right now.

[francislavoie]

I'm working on this in #431 now.