nixos-config/modules/system/services/server/nginx/default.nix

{ pkgs, config, lib, ... }:
{
  imports = [
    ./rtmp
    ./virtualhosts
  ];

  config = lib.mkIf (config.system.server.enable || config.system.mailserver.enable) {
    services.nginx = {
      enable = true;
      recommendedTlsSettings = true;
      recommendedOptimisation = true;
      recommendedGzipSettings = true;
      recommendedProxySettings = true;
    };

    networking.firewall.allowedTCPPorts = [
      80
      443
    ];
  };
}