Unable to mount a shared directory in Docker

When I try to use the -v command to mount a shared volume in the pymc/pymc3 image, I always get an error. The volume mount works fine with other linux images I use. I’d like to be able to save my Jupyter scripts on my PC so I don’t lose them. Could a directory be added to the image, say, something like “sharefiles”, that has the correct access rights so that I can use it to mount my local directory?

(I’ve tried lots of ways to get around this, but I’m a Docker newbie, so if I’m missing the right way to do this, don’t hesitate to tell me what I’m doing wrong or not doing! Thanks!)