Publish stable versions to ghcr as well

[arvid-norlander]

❯ docker pull ghcr.io/rust-lang/rust:1.90.0-alpine3.22
Error response from daemon: manifest unknown
❯ docker pull rust:1.90.0-alpine3.22                  
1.90.0-alpine3.22: Pulling from library/rust
9824c27679d3: Pull complete 
c78df034cf5e: Pull complete 
080c2047d36e: Pull complete 
Digest: sha256:1de786239f8a4d44f9079ea99339e931f02f3009f80848b72cf52ab47b821008
Status: Downloaded newer image for rust:1.90.0-alpine3.22
docker.io/library/rust:1.90.0-alpine3.22

It would be good to publish the stable images to ghcr as well, and not just to docker hub. Currently only nightly seems to be published.

This is especially an issue with the rate limits introduced by docker hub earlier this year, which tends to break CI builds in particular.

[Muscraft]

Sorry for the delay in reply.

I am hesitant to publish stable images to the GHCR as the images on DockerHub are published by Docker Official Images, which actively rebuild the images for updates and security fixes, which we do not have the infrastructure to handle. This would cause the images to drift over time as those on the GHCR would not receive the same updates as those on Dockerhub.

I personally do not have the time to implement the infrastructure needed to support this, but I would be willing to review a PR that does.

[sfackler]

We could potentially make a cron job that mirrors the docker hub images over to ghcr.