Protect the static site only to Azure Active Directory accounts

Thanks for this project. Based on the documentation it was quite straightforward to [publish an DocFx Project](https://github.com/Azure/static-web-apps/issues/367#issuecomment-978963907).

Now i have to protect the site only to specific users from our Azure Active Directory. I have implemented a solution, based on [this article](https://dev.to/bazenteklehaymanot/serving-docfx-from-net-to-add-authentication-2pak). It workes locally, but when I publish it to Azure Static Webapps I see:

> Failed to find a default file in the app artifacts folder (docs/ServeDocFx/bin/Release/net6.0). Valid default files: index.html,Index.html.

This seems to be clear, because I try to serve an .NET 6 application, which is a dll and not static.

So, I am unsure, if it can be achieved to secure the HTML pages by configuration [as described here](https://docs.microsoft.com/de-de/azure/static-web-apps/authentication-authorization?tabs=invitations). I cannot change the static files. They are, as they are. Just a set of HTML files.

Has anybody achieved to secure the access, without changing the content of the HTML files? Any tip appreciated.