style employee list (#6)

Co-authored-by: Phan Huy Tran <p.tran@neusta.de>
Reviewed-on: #6
Co-authored-by: Jan-Marlon Leibl <jleibl@proton.me>
Co-committed-by: Jan-Marlon Leibl <jleibl@proton.me>

src/app/app.component.html

@@ -1,2 +1,5 @@
+<main class="container mx-auto px-4 py-8 max-w-6xl">
+  <h1 class="text-3xl font-bold text-gray-900 mb-8">{{ title }}</h1>
 <router-outlet></router-outlet>
+</main>