fix(auth routing): scene may cause 404

when direct to /auth , it shows the login page . 
Then click 'Register' to register page . It will cause 404 beacuse the routerLink of login.component.html is '../register' .

src/app/app-routing.module.ts

@@ -21,7 +21,8 @@ const routes: Routes = [
     children: [
       {
         path: '',
-        component: NbLoginComponent,
+        redirectTo: 'login',
+        pathMatch: 'full',
       },
       {
         path: 'login',