For operating systems, the Optiplex is running Arch Linux, so that the server can get the latest packages as fast as possible. As there's not many good rolling release distros that work on the Pi, the Pi is running - Rasberry Pi OS Lite, essentially Debian with more stuff preinstalled. The Pi is currently using Caddy. The - Optiplex is primarily using Caddy, and we're working on migrating everything over to Nginx to get better speeds - and lower resource usage. + Rasberry Pi OS Lite, essentially Debian with more stuff preinstalled. Both servers use the NGINX web server.