Currently, images for https://hub.docker.com/repository/docker/sagemath/sagemath are not built automatically anymore. The main issue seems to be that there are no dedicated runners registered there anymore.

There are likely other problems since the GitLab Pipeline has not been running for ages now.

CC: @videlec

Component: docker

Reviewer: Kwankyu Lee

Issue created by migration from https://trac.sagemath.org/ticket/33406