react-prerender react-supabase react-seo- react-spa-seo- react-server-side-rendering-alternative react-cloudflare-workers- vite-seo cra-seo react-google-indexing react-open-graph react-social-sharing spa-prerendering react-bot-detection nextjs-alternative free-react-ssr react-crawlers react-ai-crawlers react-schema-markup react-meta-tags static-site-generation-react