‹app-banner›‹/app-banner›
‹app-welcome›‹/app-welcome›
‹nav›
  ‹a routerLink="/dashboard"›Dashboard‹/a›
  ‹a routerLink="/heroes"›>Heroes‹/a›
  ‹a routerLink="/about"›About‹/a›
‹/nav›
‹router-outlet›‹/router-outlet›