Disable listing of configuration files in the web

Hi! By clicking on the link https://oc-test.phoenixit.ru/config / I see a list of configuration directories. How can I turn it off?
ownCloud version 10.0.11
Apache version/2.4.18 (Ubuntu)

изображение

I did this by adding these lines to the apache site config:

<Directory /var/www/owncloud/config>
    Options -Indexes
</Directory>