[Server] Turn into executable

macOS:
- move all sudo commands to subprocess calls, which ask for sudo password each time, OR:
- capture computer password at startup, hold throughout, use `echo "password" | sudo -S ...` to run commands as sudo automatically. but then we're holding computer passwords in memory. dodgy?

Windows:
- require uac-admin on startup (doable with pyinstaller)
- test that all privileges are actually given