Chevereto how to get user real ip?

I check out my dashbord every user all is on

that just docker ip not user real ip, how can i fix it?

I saw the github readme said

If you are putting Chevereto behind a reverse proxy and need the Real IP to be passed through, edit /config/nginx/site-confs/default, and set set_real_ip_from to match the IP address/address block of your proxy server(s).

I tried to setiing or it is not working.