Update Dockerfile

images/base-notebook/Dockerfile

@@ -42,6 +42,10 @@ RUN mamba install --yes \
     'jupyterhub' \
     'jupyterlab' \
     'nbclassic' \
+    # Sometimes, when the new version of `jupyterlab` is released, latest `notebook` might not support it for some time
+    # Old versions of `notebook` (<v7) didn't have a restriction on the `jupyterlab` version, and old `notebook` is getting installed
+    # That's why we have to pin the minimum notebook version
+    # More info: https://github.com/jupyter/docker-stacks/pull/2167
     'notebook>=7.2.2' && \
     jupyter server --generate-config && \
     mamba clean --all -f -y && \