By default there are no Docker does not rotate logs of the containers. This might cause disk space issues when there is something that is intensively logging.
You can set a limit in the /etc/docker/daemon.json file. Afterwards restart docker
/etc/docker/daemon.json
{
"log-driver": "json-file",
"log-opts": {"max-size": "10m", "max-file": "3"}
}
Clearing logs manually
Running truncate -s 0 /var/lib/docker/containers/*/*-json.log will clear ALL logs.