chore: fixes build

Author: feugy

apps/nextjs/next.config.js

@@ -3,7 +3,8 @@ const nextConfig = {
   experimental: {
     serverActions: true,
   },
-  // reactStrictMode: false,
+  // https://stackoverflow.com/a/70841058
+  pageExtensions: ['page.tsx', 'page.ts', 'page.jsx', 'page.js'],
 };
 
 module.exports = nextConfig;