setting for network protected registry

Author: Ericgre

articles/app-service/reference-app-settings.md

@@ -2,7 +2,7 @@
 title: Environment variables and app settings reference
 description: Describes the commonly used environment variables, and which ones can be modified with app settings.
 ms.topic: article
-ms.date: 06/14/2021
+ms.date: 02/15/2022
 ---
 
 # Environment variables and app settings in Azure App Service
@@ -334,6 +334,7 @@ For more information on custom containers, see [Run a custom container in Azure]
 | `DOCKER_REGISTRY_SERVER_URL` | URL of the registry server, when running a custom container in App Service. For security, this variable is not passed on to the container. | `https://<server-name>.azurecr.io` |
 | `DOCKER_REGISTRY_SERVER_USERNAME` | Username to authenticate with the registry server at `DOCKER_REGISTRY_SERVER_URL`. For security, this variable is not passed on to the container. ||
 | `DOCKER_REGISTRY_SERVER_PASSWORD` | Password to authenticate with the registry server at `DOCKER_REGISTRY_SERVER_URL`. For security, this variable is not passed on to the container. ||
+| `WEBSITE_PULL_IMAGE_OVER_VNET` | Connect and pull from a registry inside a Virtual Network or on-premise. Your app will need to be connected to a Virtual Network using VNet integration feature. This setting is also needed for Azure Container Registry with Private Endpoint. ||
 | `WEBSITES_WEB_CONTAINER_NAME` | In a Docker Compose app, only one of the containers can be internet accessible. Set to the name of the container defined in the configuration file to override the default container selection. By default, the internet accessible container is the first container to define port 80 or 8080, or, when no such container is found, the first container defined in the configuration file. |  |
 | `WEBSITES_PORT` | For a custom container, the custom port number on the container for App Service to route requests to. By default, App Service attempts automatic port detection of ports 80 and 8080. This setting is *not* injected into the container as an environment variable. ||
 | `WEBSITE_CPU_CORES_LIMIT` | By default, a Windows container runs with all available cores for your chosen pricing tier. To reduce the number of cores, set to the number of desired cores limit. For more information, see [Customize the number of compute cores](configure-custom-container.md?pivots=container-windows#customize-the-number-of-compute-cores).||
@@ -728,4 +729,4 @@ HTTPSCALE_FORWARD_REQUEST
 IS_VALID_STAMP_TOKEN
 NEEDS_SITE_RESTRICTED_TOKEN
 HTTP_X_MS_PRIVATELINK_ID
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