NIE POD ROOTOM
new method from 8.8.0 and higher:
composer create-project drupal/recommended-project:8.x my_site_name_dir
old method:
composer create-project drupal-composer/drupal-project:8.x-dev project_dir --stability dev --no-interaction
https://www.drupal.org/forum/support/installing-drupal/2020-06-14/using…
composer create-project drupal-composer/drupal-project:7.x-dev project_dir