You have two things happening at once.

First. There a process that cleans up tmp files according to a configuration. Yours is probably set to clean files older than a day.

https://www.freedesktop.org/software/systemd/man/latest/tmpfiles.d.html for more information

Second, As to the folder. Docker will create a folder with the bind mount’s name if it’s not found. So Docker tries to find your promethius file, doesn’t find it, then creates a folder with that name and mounts it instead.

You should move the files out of tmp. That’ll solve all your problems.

Snapdrop if they both have a gui/webbrowser. https://github.com/SnapDrop/snapdrop

Scp otherwise

No. It’s a weekend job that implements only the tiny subset of features I care about.

Nextcloud Talk

It’s great. Been using it for years. Even wrote my own bridge that integrates beautifully with their first party ones.

Yup. It does individual/group chat messages too.

Correct!

Finished setting up an email server and am now looking into a matrix nextcloud bridge. Doesn’t seem to exist, so I guess I’m writing one.