[OnlyOneCannolo]

You can also save the image to a file:

https://docs.docker.com/engine/reference/commandline/image_s...

[atomi]

I would recommend running a registry mirror as it's fairly straightforward.

https://docs.docker.com/registry/recipes/mirror/

[OnlyOneCannolo]

That's still more effort than pushing a tar file to a free public gh repo.

[atomi]

There is a bit of upfront work, but backups are thereafter automated.

[OnlyOneCannolo]

True. I was thinking more for archiving science. Most people in that category would probably rather push to gh or upload to Dropbox than set up a docker registry.