I has active the cache on my site of Drupal 8 and of course all page are cached.

But I want that a specific page not been cached.

On my controller I built it:

MyController.php:
public function myPage() {
  return [
    '#markup' => time(),
  ];
}

How I said to Drupal that not cached this page  ?

I have activated the cache on my Drupal 8 site, and of course all pages are cached as expected.

However, I'd like to have a specific page bypass that cache.

In my controller I built the page as follows:

public function myPage() {
  return [
    '#markup' => time(),
  ];
}

How can I tell Drupal not to cache my page?