Somewhat unrelated, but GitLab put out a blog post earlier this year warning users about Docker Hub's rate limiting: https://about.gitlab.com/blog/prepare-now-docker-hub-rate-li...

We chose to move to GitLab's container registry for all the images we use. It's pretty easy to do and I'm glad we did. We used to only use it for our own builds.

The package registry is also nice. I only wish they would get out of the "experimental" status for apt mirror support.