[jupyterhub] fix

jupyterhub/base/Dockerfile

@@ -23,7 +23,7 @@ RUN curl -sL https://deb.nodesource.com/setup_10.x | bash - && \
 
 ENV IPYTHONDIR=/usr/local/etc/ipython
 COPY jupyter_notebook_config.py /usr/local/etc/jupyter
-ENV JUPYTER_CONFIG_DIR=/usr/local/etc/jupyter/jupyter
+ENV JUPYTER_CONFIG_DIR=/usr/local/etc/jupyter
 ENV JUPYTERLAB_SETTINGS_DIR=/root/.config/jupyter/lab/user-settings
 ENV JUPYTERLAB_WORKSPACES_DIR=/root/.config/jupyter/lab/workspaces