I claimed Submachine: Legacy. Thank you!

One of the most famous Canadian aviation accidents ("Gimli Glider"), was partly caused by confusion between pounds and kilograms.

Caddy is not mentioned, I take it it's not affected?

Never ever add any users to the docker group. Rootless mode is cool tho (albeit with some caveats)

The "easy" route is to use Mailcow. It spins up the entire mail stack as Docker containers and only requires minimal configuring and is easy to keep updated. You'll still need to properly set all the required DNS records (like SPF, DKIM, DMARC) if you want others to actually receive your mail and not treat it as spam. But Mailcow has a UI that helps with most of the records you'll need to set.

If you're doing it just as a learning experience, you could go for configuring Postfix, Dovecot etc. manually. The last time I did it, I used this tutorial as a base. It's not fully up to date, but it can still serve as a solid starting point.

Phone background material

Other users cannot. Your instance admin can obviously see it if they want. Then, it depends on the settings of your instance if all media downloads from other instances are proxied through your instance (hiding your IP from other instance admins) or not. I'm not sure if it's enabled by default or not.

I'm a sucker for fishnets. Fishnet tights are the cutest thing ever in my opinion

A chandelier!

Randomly happened to me too. I'm on the latest beta. I guess it's cool it prevents you doom scrolling too much...