Ports configurable and possibility to reverse proxy

Connecting to a selfhosted RustDesk server is not possible, when behind certain network routers / firewalls. Probably all ports are blocked for outgoing traffic, except for a couple of 'well known' ports (usually 53/80/443 and the such). This affects multiple environments (example: guest wifi at several establishments)
Bonus: If you have a network firewall which does Deep Packet Inspection additional challenges will probably pop up.

Currently the TCP (21115-21119) and UDP port (21116) seem to be hardcoded. It would be great to make them configurable.
Bonus: it would be excellent if everything would have the option to be put behind a reverse proxy on port 443 (e.g. as yet another virtual host on an apache server) . This would probably solve the issue above as well, but seems like a lot more work (to be honest, I currently still do not really understand how rustdesk works internally, but that is my own shortcoming)

Of course I can edit the source code, change the port numbers and compile everything myself. That might work and get it working for now, but is not the 'best' solution, so I wanted to file a proper feature request.

Some github issues which are a tiny bit similar, but less actionable (imho) from a software project standpoint. But I wanted to reference them for completeness: 185 , 80 and 46.

P.S. thank you very much for creating/maintaining/developing this excellent project

No source files, tests, or entry points are named. Start by tracing where the TCP ports 21115–21119 and UDP port 21116 are defined and how connections are established. Done would include a supported configuration path for these ports and a clarified design for reverse-proxy deployment on port 443.