Dockerhub is no longer, all the images are on Github Container registry:

Update your docker pull URLs to:
docker pull<image name>

Where <image name> was the tag name in the older Docker image land.

I meant to drop the Docker Hub a while ago, as those images were not getting updated once Dockerhub switched its billing model. When they did that,
the project had to move to Github Actions and the Github Container Registry.

Just as a warning for anyone using them, they are really intended for the CI systems and have never been evaluated beyond that
capacity. Use at your own risk and know they can disappear at any time.