<section class="app mat-app-background mat-typography">
  <store-toolbar></store-toolbar>
  <router-outlet></router-outlet>
  <store-footer></store-footer>
</section>

<section class="app mat-typography">
  <store-toolbar></store-toolbar>
  <router-outlet></router-outlet>
  <store-footer></store-footer>
</section>

Disable default background color from material
Disable default background color from material

Removes the mat-app-background class at app.component so the default
background-color (f5f5f5) is not used
