function.json

{
    "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
    "contentVersion": "1.0.0.0",
    "parameters": {
        "solutionPrefix": {
            "type": "string",
            "metadata": {
                "description": "Prefix used in resource names. Should be unique enough since this ends up being used also in domain names."
            }
        }
    },
    "variables": {},
    "resources": [
        {
            "name": "deployFunction",
            "type": "Microsoft.Resources/deployments",
            "apiVersion": "2014-04-01-preview",
            "properties": {
                "mode": "Incremental",
                "templateLink": {
                    "uri": "[listsecrets(resourceId('Microsoft.Web/sites/functions', concat(parameters('solutionPrefix'), 'function'), 'Setup'),'2015-08-01').trigger_url]",
                  "contentVersion": "1.0.0.0"
                }
            }
        }
    ]
  }