fix(deps): update nextjs monorepo to v15

cuddle-node-service/package.json

@@ -11,7 +11,7 @@
   "dependencies": {
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
-    "next": "14.1.4"
+    "next": "15.4.4"
   },
   "devDependencies": {
     "typescript": "^5",
@@ -20,8 +20,8 @@
     "@types/react-dom": "^19.0.0",
     "autoprefixer": "^10.0.1",
     "postcss": "^8",
-    "tailwindcss": "^4.0.0",
+    "tailwindcss": "^3.3.0",
     "eslint": "^8",
-    "eslint-config-next": "14.1.4"
+    "eslint-config-next": "15.4.4"
   }
 }