docs: add link to store in readme (#2046)

README.md

@@ -7,6 +7,9 @@
 # Admin template based on Angular 7+, Bootstrap 4 and <a href="https://github.com/akveo/nebular">Nebular</a>
 <a target="_blank" href="http://akveo.com/ngx-admin/pages/dashboard?theme=corporate&utm_source=github&utm_medium=ngx_admin_readme&utm_campaign=main_pic"><img src="https://i.imgur.com/OIL7rt8.png"/></a>
 
+### Backend Integration Bundles
+Easy way to integrate ngx-admin with .NET, Node.js, Java or PHP. [Checkout our Store](https://store.akveo.com/?utm_source=github&utm_medium=ngx_admin_readme) for ready to use Backend Bundles.
+
 
 ### With 3 stunning visual themes