Redo changes

Dockerfile

@@ -8,12 +8,12 @@ RUN conda config --add channels conda-forge
 RUN conda config --set channel_priority strict
 
 COPY environment.yml /home/jovyan/ 
-RUN mamba env create -f /home/jovyan/environment.yml
+RUN mamba env update -n base -f /home/jovyan/environment.yml
 # using ~/.bash_profile instead of ~/.bashrc for non-interactive tty (-it) containers
 RUN echo ". /opt/conda/etc/profile.d/conda.sh" >> /home/jovyan/.bash_profile && \
     echo "conda deactivate" >> /home/jovyan/.bash_profile && \
-    echo "conda activate earth-analytics-python" >> /home/jovyan/.bash_profile
-RUN . /opt/conda/etc/profile.d/conda.sh && conda activate earth-analytics-python && python -m ipykernel install --user --name earth-analytics-python     
+    echo "conda activate base" >> /home/jovyan/.bash_profile
+RUN . /opt/conda/etc/profile.d/conda.sh && conda activate base && python -m ipykernel install --user --name base     
 RUN source /home/jovyan/.bash_profile
 
 # Install JupyterLab widget extensions
@@ -23,6 +23,7 @@ RUN jupyter labextension install \
     jupyterlab_iframe \ 
     jupyter-leaflet \
     jupyter-threejs \
+    nbgrader \
  && npm cache clean --force
 
 RUN jupyter lab build