Scanning docker

I check the document for the docker container for Inventory scanning.
https://help.hcltechsw.com/bigfix/10.0/inventory/Inventory/planinconf/t_configuring_docker_scan.html#concept_b3k_5zz_qw

Why it say:
Excluding directories from scans
The default Docker file system directory /var/lib/docker is excluded from scanning.

Does it means the docker directory default exclude from scanning?
How could we add it back?

As I understand, it’s a matter of whether software discovered in the Docker filesystem is associated with the host, or the containers, or both.

The instructions are to exclude the scan on the Host after enabling scans of the Containers.

If the Host scan includes the Docker filesystems and the Containers are also scanned, you might show duplicate software installations if both scans detect a software package.