add template

src/app/app.footer.component.ts

@@ -0,0 +1,10 @@
+import {Component} from '@angular/core';
+import {AppComponent} from './app.component';
+
+@Component({
+    selector: 'app-footer',
+    templateUrl: './app.footer.component.html'
+})
+export class AppFooterComponent{
+    constructor(public app: AppComponent) {}
+}