Configure Nginx Proxy Manager to enable oAuth authentication requests from Rstudio Server

I have a package in my Rstudio Server that needs to authenticate via oAuth to allow me to pull data from the FitBit API. Unfortunately when I run the authentication the callback URL fails to resolve back to the RStudio server. This is because my nginx reverse proxy is not setup correctly to handle the callback. I use Nginx Proxy Manager, so can’t edit the raw .cfg files. Instead I need a freelancer to write instructions on how to correctly configure Nginx Proxy Manager to handle the URL callback. This website I think provides some of the solution: [login to view URL] I will not be able to provide direct server access, so the freelancer will have to setup their own test environment / containers. Ie. Rstudio Server + Nginx Proxy Manager The freelancer will be rewarded the final milestone when they provide working configuration instructions for me to apply to my server.