Set NODE_ENV=production for builds

Author: MOZGIII

package.json

@@ -4,7 +4,7 @@
   "packageManager": "[email protected]",
   "scripts": {
     "dev": "next",
-    "build": "next build && pagefind --site .next/server/app --output-path out/_pagefind",
+    "build": "NODE_ENV=production next build && pagefind --site .next/server/app --output-path out/_pagefind",
     "start": "next start",
     "prettier:check": "prettier --list-different .",
     "prettier:fix": "prettier --write ."