Docker Logs can grow quite large. To prevent them from filling up your filesystem, you can instruct the Docker-Daemon to do a log rotation.

This is configured in the /etc/docker/daemon.json file. If it does not yet exist, you can safely create it.
The content should be as following:

{
  "log-driver": "json-file",
  "log-opts": {"max-size": "10m", "max-file": "3"}
}

This limits the size of your logs to a maximum of 10 MB.

For the new configuration to take affect, you need to reload the Docker-Service.

[tux@server]$ systemctl reload docker

All new Containers will receive the new limits, but existing ones will not. You will need to recreate them.