Update deploy-chat-web-app.md

pre-requisite and a note for having microsoft.web resource provider to be able to deploy web app.

Author: AhmadAbdullah91

articles/ai-studio/tutorials/deploy-chat-web-app.md

@@ -39,6 +39,8 @@ The steps in this tutorial are:
 
 - You need at least one file to upload that contains example data. To complete this tutorial, use the product information samples from the [Azure-Samples/aistudio-python-quickstart-sample repository on GitHub](https://github.com/Azure-Samples/aistudio-python-quickstart-sample/tree/main/data). Specifically, the [product_info_11.md](https://github.com/Azure-Samples/aistudio-python-quickstart-sample/blob/main/data/3-product-info/product_info_11.md) contains product information about the TrailWalker hiking shoes that's relevant for this tutorial example. You can download the file or copy its contents to a file named `product_info_11.md` on your local computer.
 
+- You need to have **Microsoft.Web** resource provider registered in the selected subscription, to be able to deploy to a web app.
+
 ## Add your data and try the chat model again
 
 In the [AI Studio playground quickstart](../quickstarts/get-started-playground.md) (that's a prerequisite for this tutorial), you can observe how your model responds without your data. Now you add your data to the model to help it answer questions about your products.
@@ -68,6 +70,9 @@ Publishing creates an Azure App Service in your subscription. It might incur cos
 
 To deploy the web app:
 
+> [!NOTE]
+> You need to have **Microsoft.Web** resource provider registered in the selected subscription, to be able to deploy to a web app. 
+
 1. Complete the steps in the previous section to [add your data](#add-your-data-and-try-the-chat-model-again) to the playground. 
 
     > [!NOTE]