Update appservice-fileserver-standalone readme (#445)

* Update  appservice-fileserver-standalone readme

* Update README.md

* Update README.md

appservice-fileserver-standalone/README.md

@@ -13,19 +13,26 @@ It also creates the following resources:
 ## Notes
 Standalone file server is not HA and should only be used in dev and test scenarios.
 
+This template uses an Azure Stack Marketplace image, which must be downloaded from Azure Marketplace and made available on your Azure Stack instance:
+- The latest version of Windows Server 2016 Datacenter
+
+<!--
 <a href="https://portal.azure.com/#create/Microsoft.Template/uri/https%3A%2F%2Fraw.githubusercontent.com%2FAzure%2FAzureStack-QuickStart-Templates%2Fmaster%2Fappservice-fileserver-standalone%2Fazuredeploy.json" target="_blank">
     <img src="http://azuredeploy.net/deploybutton.png"/>
 </a>
+-->
 <a href="http://armviz.io/#/?load=https%3A%2F%2Fraw.githubusercontent.com%2FAzure%2FAzureStack-QuickStart-Templates%2Fmaster%2Fappservice-fileserver-standalone%2Fazuredeploy.json" target="_blank">
     <img src="http://armviz.io/visualizebutton.png"/>
 </a>
 
 
-## Deploying from Portal
+## Deploying from Azure Stack portal
 
-+   Login into Azurestack portal
-+   Click "New" -> "Custom" -> "Template deployment"
-+   Copy conent in azuredeploy.json, Click "Edit Template" and paste content, then Click "Save"
-+   Fill the parameters
-+   Click "Create new" to create new Resource Group
-+   Click "Create"
++   Copy azuredeploy.json content to clipboard.
++   Sign in to portal.
++   Click "+ Create a resource" -> "Custom" -> "Template deployment".
++   Click "Edit template"
++   Delete existing content, paste in content from clipboard, then click "Save".
++   Click "Edit parameters" to complete any missing/incorrect parameters, then click "OK".
++   Specify the appropriate subscription and resource group settings.
++   Click "Create".