Feature suggestion: auto-generate ARM template

[markheath]

I think it would be really helpful if func init could optionally create an ARM template, just like it can create a Dockerfile with the --docker switch.

A good starting point would be to emit an ARM template (similar to this one) that creates the following resources:

• Consumption App Service Plan
• Function App
  • correct worker runtime set up (FUNCTIONS_WORKER_RUNTIME)
  • Managed Identity enabled
• Storage Account
• App Insights

It should also create:

• A parameters file (supporting overriding the defaults in the ARM template)
• Sample deployment scripts with Azure PowerShell & Azure CLI

Would be a great way to get up and running even faster with a new Function App & the core tools.