preview flag

Author: cachai2

articles/container-apps/networking.md

@@ -307,7 +307,7 @@ In order to connect to your container apps through a private endpoint, you must
 ### Environment security
 
 > [!NOTE]
-> To control ingress traffic, you can also [use private endpoints with a private connection to Azure Front Door](how-to-integrate-with-azure-front-door.md) in place of Application Gateway.
+> To control ingress traffic, you can also [use private endpoints with a private connection to Azure Front Door](how-to-integrate-with-azure-front-door.md) in place of Application Gateway. This feature is in preview.
 
 :::image type="content" source="media/networking/locked-down-network.png" alt-text="Diagram of how to fully lock down your network for Container Apps.":::