Surface troubleshooting overview in hosting topics (#13534)

aspnetcore/host-and-deploy/azure-apps/index.md

@@ -5,7 +5,7 @@ description: This article contains links to Azure host and deploy resources.
 monikerRange: '>= aspnetcore-2.1'
 ms.author: riande
 ms.custom: mvc
-ms.date: 07/16/2019
+ms.date: 07/28/2019
 uid: host-and-deploy/azure-apps/index
 ---
 # Deploy ASP.NET Core apps to Azure App Service
@@ -36,6 +36,9 @@ Set up a CI build for an ASP.NET Core app, then create a continuous deployment r
 [Azure Web App sandbox](https://github.com/projectkudu/kudu/wiki/Azure-Web-App-sandbox)  
 Discover Azure App Service runtime execution limitations enforced by the Azure Apps platform.
 
+<xref:test/troubleshoot>  
+Understand and troubleshoot warnings and errors with ASP.NET Core projects.
+
 ## Application configuration
 
 ### Platform

aspnetcore/host-and-deploy/iis/index.md

@@ -5,7 +5,7 @@ description: Learn how to host ASP.NET Core apps on Windows Server Internet Info
 monikerRange: '>= aspnetcore-2.1'
 ms.author: riande
 ms.custom: mvc
-ms.date: 07/16/2019
+ms.date: 07/28/2019
 uid: host-and-deploy/iis/index
 ---
 # Host ASP.NET Core on Windows with IIS
@@ -25,6 +25,8 @@ The following operating systems are supported:
 
 For information on hosting in Azure, see <xref:host-and-deploy/azure-apps/index>.
 
+For troubleshooting guidance, see <xref:test/troubleshoot>.
+
 ## Supported platforms
 
 Apps published for 32-bit (x86) or 64-bit (x64) deployment are supported. Deploy a 32-bit app with a 32-bit (x86) .NET Core SDK unless the app: