Natanael

I recommend a UPS, even a small one is fine for this. Spinning disks don’t like frequent starts and stops, especially not unplanned powerless ones.

At least you should be running a journaling file system or something similar which tolerates power loss decently (you’ll still see data corruption, but the file system won’t die). If you run software that doesn’t tolerate power loss well, then you absolutely need an UPS

Probably reverse proxy too if it’s really unstable