Drupal 8 runs on all of our hosting packages. To install Drupal 8 on CiviHosting:
composer create-project drupal-composer/drupal-project:8.x-dev some-dir --no-interaction
where you can replace some-dir with whatever directory you want. If you are in /www/www/ then you could use just a dot: ..
If you now try to run Drush, it will fail however. 🙁
That is due to a PHP version issue. By default, the command line executes PHP with the 5.6 interpreter. To work around this, you can run drush like this:
Alternatively, you can set the following alias in the .bashrc file:
alias drush='php7.cli ~/www/www/drupal8/vendor/drush/drush/drush.php'
and then drush will work.