add the required devShells attribute

Author: themarkness

flake.nix

@@ -12,35 +12,12 @@
         pkgs = nixpkgs.legacyPackages.${system};
       in
       {
-        # Development environment
         devShells.default = pkgs.mkShell {
           buildInputs = with pkgs; [
             nodejs_20
             yarn
           ];
         };
-
-        # Build the application
-        packages.default = pkgs.stdenv.mkDerivation {
-          name = "my-web-app";
-          version = "1.0.0";
-          src = ./src;
-          
-          buildInputs = with pkgs; [
-            nodejs_20
-            yarn
-          ];
-
-          buildPhase = ''
-            yarn install
-            yarn build
-          '';
-
-          installPhase = ''
-            mkdir -p $out/bin
-            cp -r dist/* $out/bin/
-          '';
-        };
       }
     );
-} 
+}