update backend info

Author: shoudaos

src/app/layout/sidebar/sidebar.template.html

@@ -48,7 +48,7 @@
         </span>
         E-commerce
         <sup class="text-danger fw-semi-bold">
-          NodeJS
+          Backend
         </sup>
         <i class="toggle fa fa-angle-down"></i>
       </a>

src/app/pages/ecommerce/management/management.html

@@ -12,7 +12,10 @@ <h1 class="page-title">E-commerce - <span class="fw-semi-bold">Product Managemen
   >
     This page is only available in <a class="text-white font-weight-bold" rel="noreferrer noopener"
                                       href="https://flatlogic.com/admin-dashboards/sing-app-angular-node-js"
-                                      target="_blank">Sing App Angular with Node.js</a> integration!
+                                      target="_blank">Sing App Angular with Node.js</a> and <a
+    class="text-white font-weight-bold" rel="noreferrer noopener"
+    href="https://flatlogic.com/admin-dashboards/sing-app-angular-net-core-3/"
+    target="_blank">Sing App .NET Core 3</a> integrations!
   </alert>
 </div>
 <widget