make nix ready

frontend/default.nix

@@ -0,0 +1,33 @@
+{ pkgs ? import <nixpkgs> { } }:
+
+pkgs.buildNpmPackage {
+  pname = "my-node-app"; # Name of your package
+  version = "1.0.0"; # Your app version
+
+  # Source files (usually the current directory)
+  src = pkgs.lib.cleanSource ../frontend;
+
+  # Optionally, you can provide a package-lock.json or yarn.lock file
+  # This ensures dependencies are installed reproducibly.
+  packageLock = ./package-lock.json; # Use this for npm
+
+  # Node.js version (optional, defaults to pkgs.nodejs)
+  nodejs = pkgs.nodejs-18_x;
+  npmDepsHash = "sha256-n9SpPPRvu92RwNPDKZ3f1Splbux2IVGhSazJ4DM2IrA=";
+
+
+  # Add any additional arguments for the build process
+  buildInputs = [ ];
+
+  # Specify the build phase, if needed
+  buildPhase = ''
+    echo "Building the app..."
+    npm run build
+  '';
+
+  # Specify the install phase (what to copy to the output)
+  installPhase = ''
+    mkdir -p $out
+    cp -r dist/* $out/
+  '';
+}