Add signalr demo to samples.

docs/en/Samples/Index.md

@@ -35,6 +35,9 @@ While there is no Razor Pages & MongoDB combination, you can check both document
 * **Entity Framework Migrations**: A solution to demonstrate how to split your application into multiple databases each database contains different modules.
   * [Source code](https://github.com/abpframework/abp-samples/tree/master/DashboardDemo)
   * [EF Core database migrations document](../Entity-Framework-Core-Migrations.md)
+* **SignalR Demo**: A simple chat application that allows to send and receive messages among authenticated users.
+  * [Source code](https://github.com/abpframework/abp-samples/tree/master/SignalRDemo)
+  * [Signal Integration document](../SignalR-Integration.md)
 * **Dashboard Demo**: A simple application to show how to use the widget system for the ASP.NET Core MVC UI.
   * [Source code](https://github.com/abpframework/abp-samples/tree/master/DashboardDemo)
   * [Widget documentation](../UI/AspNetCore/Widgets.md)

docs/en/SignalR-Integration.md

@@ -78,7 +78,7 @@ gulp
 
 This will copy the SignalR JavaScript files into your project:
 
-![signal-js-file](D:\Github\abp\docs\en\images\signal-js-file.png)
+![signal-js-file](images/signal-js-file.png)
 
 Finally, add the following code to your page/view to include the `signalr.js` file 
 
@@ -222,4 +222,6 @@ ABP implements SignalR's `IUserIdProvider` interface to provide the current user
 
 ## Example Application
 
-See the [SignalR Integration Demo](https://github.com/abpframework/abp-samples/tree/master/SignalRDemo) as a sample application. It has a simple Chat page to send messaged between (authenticated) users.
+See the [SignalR Integration Demo](https://github.com/abpframework/abp-samples/tree/master/SignalRDemo) as a sample application. It has a simple Chat page to send messages between (authenticated) users.
+
+![signalr-demo-chat](images/signalr-demo-chat.png)