NixOS configuration for AWS EC2 instance

configuration.nix

{ modulesPath, pkgs, lib, ... }: {
  imports = [
    "${modulesPath}/virtualisation/amazon-image.nix"
  ];
  ec2.hvm = true;

  ################################################
  system.autoUpgrade = {
    enable = true;
    allowReboot = true;
  };

  nix.gc = {
    automatic = true;
    dates = "19:30";
  };

  ################################################
  security.sudo.wheelNeedsPassword = false;

  environment.systemPackages = with pkgs; [
    git vim file screen
    docker-compose
  ];

  ################################################
  # networking.hostName = "aws";

  services.fail2ban.enable = true;
  services.openssh = lib.mkForce {
    enable = true;
    permitRootLogin = "no";
    passwordAuthentication = false;
    forwardX11 = true;
  };

  virtualisation.docker = {
    enable = true;
    autoPrune.enable = true;
  };

  ################################################
  users.users = import ./users.nix;
  
}

users.nix

{ # options of users.users
  USER_NAME = {
    isNormalUser = true;
    extraGroups = [ "wheel" "docker" ];
    openssh.authorizedKeys.keys = [
      "<SSH_PUBKEY>" ];
  };
}