nixos-server-config/nix-containers.nix

{ config, pkgs, ... }:

{
  containers = {
    nginx = {
      autoStart = false;
      config = { config, pkgs, ...}: {
        networking = {
          firewall.allowedTCPPorts = [ 80 ];
        };
        services.nginx = {
          enable = true;
          virtualHosts = {
            www ={
              listen = [
                { addr = "0.0.0.0"; port = 80; }
                { addr = "[::]"; port = 80; }
              ];
              serverName = "nixos-server";
              locations = {
                "/" = {
                  root = "/var/www";
                };
              };
            };
          };
        };
      };
    };  
  };
}