Creation of a public page


I’m trying to write a small project right now.
I am facing a small problem, the creation of a page accessible to the public.

I have read through the documentation unfortunately I find this part particularly unclear.
I have already created the route :

return [
    'routes' => [
	   ['name' => 'page#index', 'url' => '/', 'verb' => 'GET'],
	   ['name' => 'page#indexPOST', 'url' => '/', 'verb' => 'POST'],
	   ['name' => 'page#get', 'url' => '/{client}', 'verb' => 'GET']

And add the necessary prerequisites when calling the function :

      * @NoAdminRequired
      * @publicpage
      * @NoCSRFRequired
	public function get() {
		return $this->index();  

Could you enlighten me on how to create a page accessible to the public without authentication?