added diagram

Author: asudbring

articles/nat-gateway/quickstart-create-nat-gateway-terraform.md

@@ -24,6 +24,8 @@ As with the public key, the names of the created resource group, virtual network
 
 [!INCLUDE [About Terraform](~/azure-dev-docs-pr/articles/terraform/includes/abstract.md)]
 
+:::image type="content" source="./media/quickstart-create-nat-gateway-portal/nat-gateway-qs-resources.png" alt-text="Diagram of resources created in nat gateway quickstart.":::
+
 ## Prerequisites
 
 - An Azure account with an active subscription. You can [create an account for free](https://azure.microsoft.com/free/?WT.mc_id=A261C142F).