Install fails because php artisan key:generate --no-interaction is not executed because the app is in production context. php artisan key:generate --no-interaction --force fixes this
https://github.com/BookStackApp/devops/blob/master/scripts/installation-ubuntu-16.04.sh#L53
Install fails because [`php artisan key:generate --no-interaction`](https://github.com/BookStackApp/devops/blob/master/scripts/installation-ubuntu-16.04.sh#L53) is not executed because the app is in production context. `php artisan key:generate --no-interaction --force` fixes this
https://github.com/BookStackApp/devops/blob/master/scripts/installation-ubuntu-16.04.sh#L53