There isn’t a guide yet that I’ve found. I slowly & painfully assembled all the info and beat my head against the task until I had something working & stable.
I’m currently building a comprehensive one, but due to circumstances beyond my control, it’s taking forever.
I think civilization just hasn’t gotten there yet, but I suspect I’m not the only one working on this, so I bet the reverse proxy tunnel HOWTO situation will be way better in a year or two…
FWIW I use nginx on the front end, and rathole for my tunnels - the latter is a very straightforward way to set up the tunnels.