Proxy multiple ports to the same domain

[jaulz]

It would be great if we could pass a port argument to the proxy command. Right now, I have Laravel running on port 8000 and Vite on 8001 (HMR on 8002). I can use valet proxy --secure example http://localhost:8000 to proxy the Laravel application but there is no way (as far as I can see) to also proxy other ports to the same domain. I ran a quick test and I think it should be fairly easy to implement by just creating another file in ~/.config/valet/Nginx/ (e.g. example.test_81) and refer to a different port in the server section. What do you think? Would you be open for a PR?