Support custom domains for websites deployed to Azure

[jyecusch]

Feature Request

Suggestion

Enable DNS zones or another appropriate mechanism to validate/create DNS records and issue certificates and configure a custom domain.

Value

Enables deployment of production websites/routes using a preferred custom domain, without additional post-deployment steps

Alternatives

Configure a custom domain post-deployment.

Other info

Already implemented for GCP, which can be used as a reference design for Azure.