The nginx vhost is up. The real Vite SPA bundle lands here when GitHub Actions deploy.yml next pushes a build.
Once Lovable's next push to main triggers .github/workflows/deploy.yml, this page is replaced by the joana.ai v0.2.1 chat-first home, pointing at the joana DEV Supabase.
Check GitHub Actions for the deploy.yml run status. Most likely cause: missing JOANA_DEV_SUPABASE_* GitHub Secrets.