Merge branch '66-error-page' into 'master'

Resolve "Error page"

Closes #66

See merge request swtp-block-ws17/arsnova-angular-frontend!17

src/app/app-routing.module.ts

@@ -4,9 +4,9 @@ import { PageNotFoundComponent } from './page-not-found/page-not-found.component
 import { LoginScreenComponent } from './login-screen/login-screen.component';
 
 const routes: Routes = [
-  { path: 'errorpage', component: PageNotFoundComponent },
   { path: 'home', component: LoginScreenComponent },
-  { path: '', redirectTo: '/home', pathMatch: 'full' }
+  { path: '', redirectTo: '/home', pathMatch: 'full' },
+  { path: '**', component: PageNotFoundComponent }
 ];