Ensure CORS is tightly controlled and managed for Azure Linux Function App

Too open CORS policies for Azure Linux Function App may invite unauthorized access to resources.

In Azure Console -

1. Open the Azure Portal and go to Function App.
2. Choose the Function App you wish to edit.
3. Under API, select CORS.
4. Configure as needed.

In Terraform -

1. In the azurerm_linux_function_app resource, create a cors block.
2. Configure the allowed_origins as needed.

References:
https://learn.microsoft.com/en-us/azure/azure-functions/
https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/linux_function_app#cors