nixos/modules/services/nginx.nix

{ lib, config, ... }:

{
  services.nginx = lib.mkIf config.services.nginx.enable {
    recommendedProxySettings = true;
    recommendedOptimisation = true;

    clientMaxBodySize = "512M";
    appendHttpConfig = ''
      set_real_ip_from 172.16.0.0/16;
      set_real_ip_from fd00::/56;
    '';
  };
}