Add note for WAR deploy

Explicitly mention that WAR deploy should be used for WAR files

Author: Jason Freeberg

articles/app-service/deploy-zip.md

@@ -85,6 +85,8 @@ For more information, see [Kudu documentation](https://github.com/projectkudu/ku
 
 To deploy a WAR file to App Service, send a POST request to `https://<app_name>.scm.azurewebsites.net/api/wardeploy`. The POST request must contain the .war file in the message body. The deployment credentials for your app are provided in the request by using HTTP BASIC authentication.
 
+Always use `/api/wardeploy` when deploying WAR files. This API will expand your WAR file and place it on the shared file drive. Otherwise, you may experience inconsistent deployment behavior. 
+
 For the HTTP BASIC authentication, you need your App Service deployment credentials. To see how to set your deployment credentials, see [Set and reset user-level credentials](deploy-configure-credentials.md#userscope).
 
 ### With cURL