As well as auditing the normal Linux file system and system calls, you should also audit all Docker related files and directories. The Docker daemon runs with root privileges and its behavior depends on some key files and directories with docker.service being one such file. The docker.service file might be present if the daemon parameters have been changed by an administrator. If so, it holds various parameters for the Docker daemon and should be audited.
If the file exists, a rule for it should be added. For example: Add the line: '-w /usr/lib/systemd/system/docker.service -k docker' to the /etc/audit/audit.rules file. Then, restart the audit daemon using the following command: systemctl restart auditd