add region restriction

Author: mumian

articles/azure-resource-manager/templates/deployment-script-template.md

@@ -5,7 +5,7 @@ services: azure-resource-manager
 author: mumian
 ms.service: azure-resource-manager
 ms.topic: conceptual
-ms.date: 03/30/2020
+ms.date: 04/03/2020
 ms.author: jgao
 
 ---
@@ -29,6 +29,8 @@ The benefits of deployment script:
 - Allow passing command-line arguments to the script.
 - Can specify script outputs and pass them back to the deployment.
 
+The deployment script resource is only available in the regions where Azure Container Instance is available.  See [Resource availability for Azure Container Instances in Azure regions](../../container-instances/container-instances-region-availability.md).
+
 > [!IMPORTANT]
 > Two deployment script resources, a storage account and a container instance, are created in the same resource group for script execution and troubleshooting. These resources are usually deleted by the script service when the deployment script execution gets in a terminal state. You are billed for the resources until the resources are deleted. To learn more, see [Clean-up deployment script resources](#clean-up-deployment-script-resources).