updated default.nix shell for nextjs

default.nix

@@ -1,15 +1,17 @@
-{ pkgs ? import <nixpkgs> {} }:
-
 let
-    nodePackages = pkgs.nodePackages;
+  pkgs = import <nixpkgs> {};
 in
+
 pkgs.mkShell {
   buildInputs = [
-        nodePackages.nodejs
-        nodePackages.yarn
+    pkgs.nodejs
+    pkgs.yarn
   ];
 
+  # Install Next.js via yarn in the shell
   shellHook = ''
-        echo "Welcome to the bakery-template development environment!"
+    if ! [ -d "node_modules" ]; then
+      yarn add next react react-dom
+    fi
   '';
 }

package.json

@@ -12,10 +12,10 @@
     "@svgr/webpack": "^8.1.0",
     "framer-motion": "^11.11.11",
     "keen-slider": "^6.8.6",
-    "next": "15.0.2",
-    "react": "^18.2.0",
+    "next": "^15.1.6",
+    "react": "^19.0.0",
     "react-awesome-slider": "^4.1.0",
-    "react-dom": "^18.2.0",
+    "react-dom": "^19.0.0",
     "sass": "^1.83.4"
   },
   "devDependencies": {