add iisnode note

Author: cephalin

articles/app-service/app-service-web-get-started-nodejs.md

@@ -29,10 +29,6 @@ ms.custom: mvc, devcenter
 
 You can follow the steps here using a Mac, Windows, or Linux machine. Once the prerequisites are installed, it takes about five minutes to complete the steps.   
 
-> [!VIDEO https://channel9.msdn.com/Shows/Azure-for-Node-Developers/Create-a-Nodejs-app-in-Azure-Quickstart/player]   
-
-[!INCLUDE [quickstarts-free-trial-note](../../includes/quickstarts-free-trial-note.md)]
-
 ## Prerequisites
 
 To complete this quickstart:
@@ -61,6 +57,9 @@ You see the **Hello World** message from the sample app displayed in the page.
 
 In your terminal window, press **Ctrl+C** to exit the web server.
 
+> [!NOTE]
+> In Azure App Service, the app is run in IIS using [iisnode](https://github.com/tjanczuk/iisnode). To enable the app to run with iisnode, the root app directory contains a web.config file. The file is readable by IIS, and the iisnode-related settings are documented in [the GitHub repository](https://github.com/tjanczuk/iisnode/blob/master/src/samples/configuration/web.config).
+
 [!INCLUDE [Create ZIP file](../../includes/app-service-web-create-zip.md)]
 
 [!INCLUDE [cloud-shell-try-it.md](../../includes/cloud-shell-try-it.md)]
@@ -164,6 +163,12 @@ The left menu provides different pages for configuring your app.
 
 [!INCLUDE [cli-samples-clean-up](../../includes/cli-samples-clean-up.md)]
 
+## Video
+
+> [!VIDEO https://channel9.msdn.com/Shows/Azure-for-Node-Developers/Create-a-Nodejs-app-in-Azure-Quickstart/player]   
+
+[!INCLUDE [quickstarts-free-trial-note](../../includes/quickstarts-free-trial-note.md)]
+
 ## Next steps
 
 > [!div class="nextstepaction"]

articles/app-service/app-service-web-tutorial-nodejs-mongodb-app.md

@@ -113,6 +113,9 @@ Select **Admin > Manage Articles** to add some articles.
 
 To stop Node.js at any time, press `Ctrl+C` in the terminal. 
 
+> [!NOTE]
+> The [Node.js quickstart](app-service-web-get-started-nodejs.md) mentions the need for a web.config in the root app directory. However, in this tutorial, this web.config file will be automatically generated by App Service when you deploy your files using [local Git deployment](app-service-deploy-local-git.md) instead of ZIP file deployment. 
+
 [!INCLUDE [cloud-shell-try-it.md](../../includes/cloud-shell-try-it.md)]
 
 ## Create production MongoDB