I'd like to use Firebase for app/web hosting, but it appears that that Firebase only really supports java apps. For my Shiny or Streamlit apps, I can't even use Firebase user authentication for web hosting, and instead I have to set up a load balance and IAP. I have been using the Cloud Run Custom Domain mapping integration for Cloud Run services, until I hit the "dead end" of a max 15 SSL certificates for a single GCP project (certificate setup cannot be changed in the GCP Cloud run web UI). I was hoping that Firebase would be a good alternative, but it has a limit of 20 SSL certs and doesn't really support non-java apps. Bummer...