My server is literally 2 meters behind me (yes, I mind the noise, don't cohabitate with full depth 4u machines, on the other hand it does help with heating this

My server is literally 2 meters behind me (yes, I mind the noise, don't cohabitate with full depth 4u machines, on the other hand it does help with heating this winter..)-- Static IP is most difficult, if you got that, you're good to go... If your website or app is light enough, sure, go with a pi4 or similar, don't put a fan on it, maybe a nice enough heatsink (use real thermal glue, NOT adhesive tape, some of the cheaper stuff actually melts and the block falls off).. Consider a 3 way router, like an edgerouter lite, so you can have a DMZ for the "server" so that if someone decides to visit, they're isolated from your other LAN machines.