Hi @lucas7c ! I’m happy to help. Yeah, due to it being a reverse proxy, unfortunately it’ll require a few additional configurations here for it to work. This may not be ideal as any edits made the nginx configuration will reset on any restarts/shutdowns/upgrades thus having to make those configurations again. There is a feature request here for the ability to edit nginx easily.
If you’re interested in editing nginx, we have a post here that might help with that. Essentially you’ll need to change the root directory on nginx to load from the reverse proxy sub-directory. Additionally, you’ll need to add rewrite ^/subsite-will-load-here/(.*)$ /$1 last; within nginx to ensure it loads from the sub-directory.
Let me know if you have any questions along the way on setting this up.