They should have known it already, as this was discussed in this topic: Docker does read my path - #3 by gheorgheslicari,
To answer your question, functional knowledge about how selenium works is required. So you will need to wait until a forum user, who actually has practical experience with it, stumbles across your topic and feels like responding.
I am confident, that the number of Selenium users that use containers to run their Selenium tests, is a magnitude higher in a Selenium forum, than in a Docker community forum, where most people don’t use it.
Last time I dealt with Selenium is almost 10 years ago.