Since we direct users who wish to build their own copy of a cookbook and run it locally that they can type jupyter lab to work in the cookbook, we need to include jupyterlab in environment.yml. Else, when the user types `jupyter lab' on their command line, it will fail.
Since we direct users who wish to build their own copy of a cookbook and run it locally that they can type
jupyter labto work in the cookbook, we need to includejupyterlabinenvironment.yml. Else, when the user types `jupyter lab' on their command line, it will fail.