[FEATURE]: Auto-fill App service health endpoint

[MartinPankraz]

What area do you want to see improved?

• app code
• documentation
• infrastructure setup
• developer experience (GitHub CodeSpaces etc.)
• other

Is your feature request related to a problem? Please describe.

Upstream service capabilities like global routing through Front-Door, instance scaling or failover rely on a suitable health endpoint.

Describe the solution you'd like

To re-use the mechanism provided by App Service it would be great to hook up the pass-through health endpoint existing on the repos here

Describe alternatives you've considered

No response

Additional context

No response

[MartinPankraz]

@lechnerc77 any leads on bicep config for the health endpoint setup? Or do we need to script?

[lechnerc77]

The configuration of the health endpoint is part of the .bicep module for App Service (see https://learn.microsoft.com/en-us/azure/templates/microsoft.web/sites?pivots=deployment-language-bicep -> search for healthCheckPath)-
However it is not exposed as parameter of the core modules. So for the time being we must copy the module and add the parameter (and then do a PR to the azd repository).

The same is true for Terraform. The module contains the parameter as health_check_path (see https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/linux_web_app), but is not part of the varaibales available in the azd core module appservicenode.tf and appservicenode_variables.tf.

So a bit of work to copy and rereference things.

[lechnerc77]

The health endpoint will only come into play if the App Service Plan is not FREE/F1 or SHARED :

The deployment will ignore the health endpoint in these plans. For B1 everything works as expected