order of config files

On CI3. The order is application/config then application/config/environment. So environment dependent code can be placed on environment

How about CI4 ?

I want to put :

PHP Code:

$hostName = $_SERVER['HTTP_HOST'];
if(empty($_SERVER['HTTPS'])){
    $this->baseURL = "http://$hostName";
}else{
    $this->baseURL = "https://$hostName";
 } 


so my app can adapt when accessed from actual host and domain alias (no redirection so they look as different site for visitor).
Also cookie domain needs to change.

So where do i put? application/Config/App.php, .env, bootstrap ?
Apso APPPATH not work on .env