Update azure-storage-linux-container-pivot.md to include call out about Azure Files vs. Azure Blob usage

Adding a section under "Best Practices" for "Configuration". This is to explicitly call out that if wanting to use a "real time"  file system where file changes/operations are expected, use Aure Files. Blob is only really recommended for static content.

Author: Ajsalemo

articles/app-service/includes/configure-azure-storage/azure-storage-linux-container-pivot.md

@@ -218,6 +218,9 @@ To validate that the Azure Storage is mounted successfully for the app:
     1. Regenerate **key2**.
     1. In the storage mount configuration, update the access the key to use the regenerated **key2**.
     1. Regenerate **key1**.
+ 
+#### Configuration
+- If needing to use a real time file system, where changes to alter, add, or remove files are expected to be shown quickly, then use _Azure Files_ as the storage type when mounting storage. Azure Blob should be used when files are static and aren't expected to be changed. 
 
 #### Troubleshooting