[grade=A] SEO expansion: generated sitemap (14->108 URLs) + RSS feed + 4 keyword articles + 77-app catalog hub

package.json

@@ -4,6 +4,7 @@
   "private": true,
   "scripts": {
     "dev": "next dev",
+    "prebuild": "node scripts/generate-sitemap.mjs",
     "build": "next build",
     "start": "next start",
     "lint": "eslint"