Added link to .Net Core implementation

Author: ruisilva450

samples/Backend on ASP.NET MVC.md

@@ -1,5 +1,7 @@
 # Backend on ASP.NET MVC
 [Flowjs ASP.NET MVC](https://github.com/DmitryEfimenko/FlowJs-MVC)  
+
+[FlowJS .Net Core API](https://github.com/ruisilva450/FlowJs-NetCore)
 
 [Handled as a MVC 5 pre-action filter](https://github.com/Grummle/FlowUploadFilter)