remove angular boiler-plate code and update app component

src/app/app.component.ts

@@ -1,9 +1,12 @@
 import { Component } from '@angular/core';
 import { RouterOutlet } from '@angular/router';
 
+import { FooterComponent } from './footer/footer.component';
+import { HeaderComponent } from './header/header.component';
+
 @Component({
   selector: 'app-root',
-  imports: [RouterOutlet],
+  imports: [RouterOutlet, HeaderComponent, FooterComponent],
   templateUrl: './app.component.html',
   styleUrl: './app.component.scss',
 })