chore: set runtime to nodejs in middleware configuration

Author: Nathan Booker

core/middleware.ts

@@ -29,4 +29,5 @@ export const config = {
      */
     '/((?!api|admin|_next/static|_next/image|_vercel|favicon.ico|xmlsitemap.php|sitemap.xml|robots.txt).*)',
   ],
+  runtime: 'nodejs',
 };