Using jupyter lab clean command instead of rm (#752)

[romainx]

As discussed in #752 , just replaced a rm by a call to jupyter lab clean for clarity reasons.
The result is the same the $CONDA_DIR/share/jupyter/lab/staging is removed.

[s-rog]

Is there a reason this is not applied to all dockers? The base notebook still uses rm.

[romainx]

@s-rog nice catch you must be right — I checked the history of issues. Could you please create and issue or directly draft a PR to fix it?

$ jupyter lab clean --help
# Clean the JupyterLab application

# This will clean the app directory by removing the `staging` directories.
# Optionally, the `extensions`, `settings`, and/or `static` directories, or the entire contents of the app directory, can also be removed.

docker-stacks/base-notebook/Dockerfile

Line 140 in 69c3826

rm -rf $CONDA_DIR/share/jupyter/lab/staging && \

Many thanks