composer require drush/drush:8.*
wget -O drush.phar https://github.com/drush-ops/drush-launcher/releases/latest/download/drush.phar
chmod +x drush.phar
mv drush.phar /usr/local/bin/drush
# use vendor/bin/drush to download drupal
composer require drush/drush:8.*
wget -O drush.phar https://github.com/drush-ops/drush-launcher/releases/latest/download/drush.phar
chmod +x drush.phar
mv drush.phar /usr/local/bin/drush
# use vendor/bin/drush to download drupal