I’d like to have an new wordpress installation. After removing and installing wordpress I found my old configuration an texts and so on. So I remove wordpress again by using the app center an I also removed the docker container by docker rmi [id.number].
this should completely remove the wordpress data and files (after the app has been removed).
-> mysql -u root --password="$(cat /etc/mysql.secret)"
DROP DATABASE wordpress;
DELETE FROM mysql.user WHERE User='wordpress';
-> rm -rf /var/lib/univention-appcenter/apps/wordpress/wordpress/