Comment by WhyNotHugo

I packaged docker-rootless Arch (AUR) and Alpine (community) downstream long ago. I'm sure it's available for other distros too nowadays, although it wasn't at the time.

Docker could definitely do a much better job of making packaging easier. The docker-rootless just includes an sh script which has several of the files inline and writes them to the target location… assuming you're making a user-only installation (even though other potions of the setup require root intervention).

So packaging this requires reverse engineering how the installation process works, and extracting some of those inline files from the sh script, and figuring out where they'd be installed for a system-wide location.