Behind reverse proxy, ERR_CONNECTION_RESET 200

Hi,

Newly installed GitLab onprem server, installed on latest Debian 11 release.

GitLab are behind reverse proxy

Problem on login screen, does not look as it shuld:

Problem after login, empty and menu does not work:

Developer (F12):

I instructed nginx to listen to port 80 and now everything works.

is there no way to use port 443 when using reverse proxy in front of GitLab?