Fixes site-install error.
Fixes site-install error.

Error: `In SiteInstallCommands.php line 367: Failed to drop or create the database:`
This is due because the `systemctl start mysql` command failed due to missing volume. Fix was to add the missing volume to the command.
Also, resolves #1856
geerlingguy/drupal-vm,akeemw/drupal-vm,debugacademy/drupal-vm,akeemw/drupal-vm,kentr/drupal-vm,akeemw/drupal-vm,debugacademy/drupal-vm,kentr/drupal-vm,debugacademy/drupal-vm,akeemw/drupal-vm,geerlingguy/drupal-vm,kentr/drupal-vm,geerlingguy/drupal-vm,geerlingguy/drupal-vm,kentr/drupal-vm,debugacademy/drupal-vm,kentr/drupal-vm