Didn't we want to stay with port 8888 because that is what Jupiter prints as the URL when it starts? I remember users getting confused by that.

This is consistent with the script that we run automatically, so Jupyter will print the right thing:
https://github.com/brainiak/brainiak-tutorials/blob/master/tutorials/run_jupyter_docker.sh#L2

Do we want the tutorials to automatically start? Seems like most of the time the user of brainiak docker will not be using the tutorials.

I think the tutorials are a great way to start for all users of BrainIAK. At the same time, we should add instructions to the website about starting a shell (hint: add -c bash at the end of the docker run command).

For clarity I'd prefer to have WORKDIR /mnt and
&& python3 -m pip install --user -U brainiak
&& python3 -m pip install --user -U -r brainiak/tutorials/requirements.txt
&& for example in brainiak/examples/*/requirements.txt; \

From the user perspective, I think WORKDIR should be brainiak, so users can easily find the tutorials and examples. As for clarity in the Dockerfile for developers, I think developers are used to working inside the brainiak directory.