add nix run

flake.nix

@@ -6,16 +6,24 @@
   outputs = { self, nixpkgs }:
     let
       pkgs = import nixpkgs { system = "x86_64-linux"; };
+      start =
+        pkgs.writeShellScriptBin "start" ''
+          set -e
+          export QEMU_NET_OPTS="hostfwd=tcp::8080-:80,hostfwd=tcp::1433-:143,hostfwd=tcp::5877-:587"
+          ${pkgs.nixos-shell}/bin/nixos-shell vm-nextcloud.nix
+        '';
     in
     {
       devShells.x86_64-linux.default = pkgs.mkShell {
         packages = with pkgs; [
           phpPackages.composer
-          phpPackages.phpunit
+          phpunit
           nixos-shell
           nodejs
         ];
       };
+      packages = { inherit start; };
+      defaultPackage = start;
     };
 }