Update .nix/env.nix

.nix/env.nix

@@ -0,0 +1,10 @@
+{ pkgs ? import <nixpkgs> {} }:
+pkgs.mkShell {
+  buildInputs = with pkgs; [
+    nodejs_20
+    python3
+    ffmpeg
+    chromium
+    playwright
+  ];
+}