This doc needs more details on what is supported with azd and an advanced section on spitting out IaC using azd infra synth.

I would to see an explanation of what goes into azure.yaml for aspire apps.

• A list of supported resources.
• An explanation about what azd does
  • Interrogates the apphost for the manifest (with a link to a doc that @mitchdenny is writing)
  • Sets up service discovery information
  • Sets up connection strings.
  • Deploys infrastructure (describing what it does with managed identity etc)
  • Builds containers (explaining how it does this and how to influence it)
  • Explains the default ingress rules that we setup for ACA
  • Explains how grpc and http2 works

cc @ellismg @mitchdenny