add button image

Author: vhorne

articles/application-gateway/media/quick-create-template/deploy-to-azure.png

@@ -50,7 +50,11 @@ Multiple Azure resources are defined in the template:
 
 Deploy Resource Manager template to Azure:
 
-    <a href="https://portal.azure.com/#create/Microsoft.Template/uri/https%3A%2F%2Fraw.githubusercontent.com%2FAzure%2Fazure-quickstart-templates%2Fmaster%2Fag-docs-qs%2Fazuredeploy.json"><img src="./media/blob-event-quickstart-template/deploy-to-azure.png" alt="deploy to azure"/></a>
+1. Select the following image to sign in to Azure and open a template. The template creates an Azure Cosmos account, a database, and a container.
+
+   <a href="https://portal.azure.com/#create/Microsoft.Template/uri/https%3A%2F%2Fraw.githubusercontent.com%2FAzure%2Fazure-quickstart-templates%2Fmaster%2Fag-docs-qs%2Fazuredeploy.json"><img src="./media/quick-create-template/deploy-to-azure.png" alt="deploy to azure"/></a>
+
+2. Select or enter the following values.
 
 ## Validate the deployment