Docker jupyter lab version broken

[davidpcls]

I had this happen for me on all versions of the bluesky tutorial docker image that I tested. The fix was to create a new docker file that correctly updated jupyter lab.

` FROM nsls2/tutorials:latest

RUN pip install -U "jupyter-server<2.0.0" `

Then build the image and run it.

docker build -f bluesky.dockerfile -t fixed-bluesky .

docker run -p 8888:8888 fixed-bluesky:latest