The way I found this:

$ composer create-project -n -sdev zendframework/skeleton-application skelly
$ cd skelly

Edit module/Application/src/Application/Controller/IndexController.php

Update indexAction so that it looks like this:

public function indexAction()
{
    var_dump($this->getEventManager());exit;
    return new ViewModel();
}

$ php -S 0.0.0.0:8888 -t public public/index.php

in a separate console:

$ curl -s http://localhost:8888/ > output.txt

Can't promise it really works, but you might just get the process killed by OOM if you're doing it wrong™.