How to mount a directory into a agent container?

I have deployed a self-hosted datalore.
Now, I want to mount a folder for every agent, resulting in the notebook of Datalore can access files of the host machine. I try to modify the config of “docker-compose.yaml”, and add a item in services.datalore.volumes. However, I can not find the mapped directory in agent docker, but can find the directory in the container named docker-compose-datalore-1.

Grateful for anyone who can help resolve my question.