Update front-door-faq.yml

Can I set alerts with Azure Front Door?
Yes, Azure Front Door does support alerts. Alerts are configured on metrics. 

Add the link to create alerts under the text "alerts" and the link to metrics here under the text "Metrics". https://docs.microsoft.com/en-us/azure/frontdoor/standard-premium/how-to-monitor-metrics#configure-alerts-in-azure-portal 
https://docs.microsoft.com/en-us/azure/frontdoor/front-door-diagnostics#metrics

Author: asukumar22

articles/frontdoor/front-door-faq.yml

@@ -262,7 +262,8 @@ sections:
       - question: |
           Can I set alerts with Azure Front Door?
         answer:  |
-          Yes, Azure Front Door does support alerts. Alerts are configured on metrics. 
+          Yes, Azure Front Door does support alerts. Alerts are configured on metrics. For reference to create alerts, please check https://docs.microsoft.com/en-us/azure/frontdoor/standard-premium/how-to-monitor-metrics#configure-alerts-in-azure-portal 
+          And for more information about metrics available on Front Door diagnostic monitoring refer to https://docs.microsoft.com/en-us/azure/frontdoor/front-door-diagnostics#metrics
       
 additionalContent: |