Loading external modules when running in docker #3

I couldn't quite figure out how to get external modules to load when running the docker image.
It says in the docs "Note that require() will search for modules starting from the working directory of Redis or KeyDB"

• Specifically within the docker image, which directory is that?
• Should I map a folder of node_modules with my modules in it to that location? or the module (ex: lodash) folder itself?

Thanks so much!