feat: Uncomment and update outputs section in flake.nix for improved Nix build configuration

flake.nix

@@ -7,27 +7,27 @@
   };
 
   outputs = { self, nixpkgs, flake-utils }:
-  /*
     flake-utils.lib.eachDefaultSystem (system:
       let
         pkgs = nixpkgs.legacyPackages.${system};
         node-modules = pkgs.mkYarnPackage {
           name = "node-modules";
           src = ./.;
+          packageJSON = ./package.json;
+          yarnLock = ./yarn.lock;
         };
         frontend = pkgs.stdenv.mkDerivation {
           name = "frontend";
           src = ./.;
-          buildInputs = [pkgs.yarn node-modules pkgs.lmdb];
+          buildInputs = [pkgs.yarn node-modules pkgs.nodejs];
           buildPhase = ''
-            ln -s ${node-modules}/libexec/kucinako/node_modules node_modules
+            ln -sf ${node-modules}/libexec/kucinako/node_modules node_modules
             ${pkgs.yarn}/bin/yarn build
           '';
-          installPhase =  ''
-          mkdir $out
-          mv dist $out/dist
+          installPhase = ''
+            mkdir -p $out
+            cp -r dist/* $out/
           '';
-
         };
       in 
         {
@@ -35,8 +35,15 @@
             node-modules = node-modules;
             default = frontend;
           };
+          
+          devShells.default = pkgs.mkShell {
+            buildInputs = [
+              pkgs.nodejs
+              pkgs.yarn
+              pkgs.nodePackages.typescript
+            ];
+          };
         }
     );
-    */
 }