feat: add discovery service to menu list

Author: vahidvdn

src/app/homepage/menu/menu.component.ts

@@ -59,6 +59,10 @@ export class MenuComponent implements OnInit {
           title: 'Circular dependency',
           path: '/fundamentals/circular-dependency',
         },
+        {
+          title: 'Discovery Service',
+          path: '/fundamentals/discovery-service',
+        },
         {
           title: 'Module reference',
           path: '/fundamentals/module-ref',