Special thanks.
Doing these steps we have managed to install it with the UnRaid terminal.
Here is how to reset the AIO instance properly:
Stop all containers if they are running from the AIO interface
Stop the mastercontainer with sudo docker stop nextcloud-aio-mastercontainer
If the domaincheck container is still running, stop it with sudo docker stop nextcloud-aio-domaincheck
Check which containers are stopped: sudo docker ps --filter "status=exited"
Now remove all these stopped containers with sudo docker container prune
Delete the docker network with sudo docker network rm nextcloud-aio
Check which volumes are dangling with sudo docker volume ls --filter "dangling=true"
Now remove all these dangling volumes: sudo docker volume prune (on Windows you might need to remove some volumes afterwards manually with docker volume rm nextcloud_aio_backupdir, docker volume rm nextcloud_aio_nextcloud_datadir). Also if you've configured NEXTCLOUD_DATADIR to a path on your host instead of the default volume, you need to clean that up as well.
Optional: You can remove all docker images with sudo docker image prune -a.
And you are done! Now feel free to start over with the recommended docker run command!
