Fwiw, yesterday I was messing about with GitLab backups. One of the options for direct off-site is S3. But I want that S3 bucket to live on a box on my own Tailnet.

So I too just want simple S3. Minio used to be the no-brainer. I'll checkout RustFS as well.

It does not sound hard (although it is hard for me!). It sounds like it should be some LinuxServer io container. Doesn't it? At this point S3 is just as standard as WebDav or anything right?