Reverse proxy: support X-Forwarded-Port, or allow some sort of --proxy-port
===========================================================================
I'm hosting transfer.sh on a certain server where unfortunately port 443 is off limits, so I'm exposing the service on port 8443 instead. I'm using nginx as a reverse proxy in front of the transfer.sh server, where the configuration includes
```nginx
proxy_set_header Host $host;
# ...
proxy_set_header X-Forwarded-Port 8443;
```
The server doesn't support the `X-Forwarded-Port` header though, so unfortunately all URLs I get don't have the port attached. Is it possible to add support for the header, or maybe add some server option so that a non-default port could be used? Thanks.