+1 for LocalSend. Well worth checking out.

Seconding this, I really can’t see the point of encryption on local only connections. Are you ready worried about someone hacking your WiFi?

Anyway, if you do want to do a reverse proxy, I’ll make my usual recommendation of Caddy instead. It handles certificates for you, using Let’s Encrypt, so there’s no need to add exceptions in your browser. And reverse proxying with Caddy is literally a one line config.

I’m a huge fan of Caddy and I wish more people would try it. The utter simplicity of the config file is breathtaking when you compare it with Apache or Nginx. Stuff that takes twenty or thirty lines in other webservers becomes just one in Caddy.