Enhance Front Door setup instructions

Added instructions for verifying Front Door endpoint and App Service page display time.

Author: staleycyn

Instructions/Exercises/M05-Unit 6 Create a front door for a highly available web application using the Azure portal.md

@@ -110,6 +110,7 @@ Once you create a Front Door, it takes a few minutes for the configuration to be
 1. On the Front Door resource in the Overview blade, locate the endpoint hostname that is created for your endpoint. This should be fdendpoint followed by a hyphen and a random string. For example, **fdendpoint-fxa8c8hddhhgcrb9.z01.azurefd.net**. **Copy** this FQDN.
 
 1. In a new browser tab, navigate to the Front Door endpoint FQDN. An information page that states the web app is up and running and waiting for content will be displayed.
+
     ![Screenshot showing web app is waiting for content.](../media/front-door-app-ready.png)
 
 1. It can take up to an hour before the default App Service page is displayed.