You can create a new file and add it to your RouteServiceProvider. Something like this should do:
protected function mapPublicRoutes()
{
Route::group([
'namespace' => $this->namespace,
], function ($router) {
require base_path('routes/public.php');
});
}
Make sure you call this new method in your map function as well
public function map()
{
$this->mapWebRoutes();
$this->mapApiRoutes();
$this->mapPublicRoutes();
}
And of course don't forget to create a new public.php file in your routes directory.
An alternative method would be removing the auth middleware from the mapWebRoutes method and make your own route group in the web.php file ;)