This is my Friendica server. Left to right, the boxes are: Power over Ethernet splitter, Raspberry Pi 4b (2 gig) in official case, 256 gig SATA SSD in a USB3 to SATA enclosure.

That’s it. That’s what this post you’re reading federated from.
So a fun little update. The SSD in the picture was a cheap piece of junk, no faster than an SD card. It failed at about half past ten last night. @zoeimogen was able to recover the data and we’re back in business, but lesson learned: do not buy no-name Chinese SSDs.