okay Internet, I need your suggestions: I have a static website that I can't modify, and I want to host it on some platform that I can tie to an arbitrary OpenID Connect provider so that only certain people can access it. What's the easiest way to do this?

That's exactly what I want, but is there anything lighter weight than those platforms? It feels way overkill. I can't find a corresponding feature in Netlify or Heroku for example though.