configuration.nix

{ config, pkgs, ... }:

{
  imports = [ <nixpkgs/nixos/modules/installer/virtualbox-demo.nix> 
];
  
  programs.fish.enable = true;


  users.extraUsers.demo = {
    shell = "/run/current-system/sw/bin/fish";
  };

  users.users.demo = {
    isNormalUser = true;
    home = "/home/demo";
    extraGroups = [ "wheel" "networkmanager" "docker"];
    openssh.authorizedKeys.keys = [ "ssh-dss AAAAB3Nza... 
demo@foobar" ];
  };

  security.sudo.wheelNeedsPassword = false;
 
  environment.systemPackages = [
    pkgs.gnome3.gedit
    pkgs.bind
    pkgs.docker_compose
    pkgs.git
  ];

  virtualisation.docker.enable = true;
  

  services.traefik.group = "docker";
}