Changes to NC after installation of reverse proxy

HW: Raspi 4 8gb +SSD
OS: ubuntu 20.04.1 LTS
NC 20.0.5
nginx 1.19.6
PHP 7.4.14
DB mysql 10.3.25

NC is running flawlessly. In order to use addition servers, I want to install nginx reverse proxy on a separate RPI. What changes are needed on the current installation to make it work with the nginx-RP?