Can the /var/discourse and /var/lib/docker folders be on different volumes?

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(Oops, it’s /var/lib/docker)

My /var/discourse/shared/standalone folder is 19.3GB (in postgres_data, uploads, and backups subfolders), and my /var/lib/docker/overlay2 folder is 12.6GB.

So the /var/discourse folder has my actual forum data. And the /var/lib/docker folder would have the docker images (and the actual Discourse software?)