How to configure resources for Synology Services

Hi, 

I want to setup a resource for synology notes. In my nginx, I have a notes.conf  that redirects to  https://nas.domain.tld/notes$request_uri. I have a separate nas.conf that translates the x.x.x.x:5001 to nas.domain.tld.   How do I achieve the same thing in Pangolin? I don't have any way of setting the path after the ip:port