feat: Add Nix app to serve frontend with Python HTTP server

flake.nix

@@ -27,6 +27,14 @@
           installPhase = ''
             mkdir -p $out
             cp -r dist/* $out/
+            
+            # Create a bin directory with a wrapper script
+            mkdir -p $out/bin
+            cat > $out/bin/frontend <<EOF
+            #!/bin/sh
+            ${pkgs.python3}/bin/python -m http.server --directory $out 8000
+            EOF
+            chmod +x $out/bin/frontend
           '';
         };
       in 
@@ -36,6 +44,11 @@
             default = frontend;
           };
           
+          apps.default = {
+            type = "app";
+            program = "${frontend}/bin/frontend";
+          };
+          
           devShells.default = pkgs.mkShell {
             buildInputs = [
               pkgs.nodejs