[jupyterhub] Add jupyterlab code formatting extension + black&isort

jupyterhub/Dockerfile

@@ -32,7 +32,12 @@ RUN python${PYTHON_VERSION} -m pip --no-cache-dir install \
         jupyter-webrtc \
         ipyvolume \
         jupyter-threejs \
-        @axlair/jupyterlab_vim
+        @axlair/jupyterlab_vim \
+    && \
+    python${PYTHON_VERSION} -m jupyter labextension install @ryantam626/jupyterlab_code_formatter && \
+    python${PYTHON_VERSION} -m pip --no-cache-dir install jupyterlab_code_formatter && \
+    python${PYTHON_VERSION} -m jupyter serverextension enable --sys-prefix --py jupyterlab_code_formatter && \
+    python${PYTHON_VERSION} -m pip --no-cache-dir install black isort
 
 RUN mkdir -p ~/.venv && \
     python${PYTHON_VERSION} -m venv ~/.venv/robofish && \
@@ -42,6 +47,8 @@ RUN mkdir -p ~/.venv && \
     pip install tensorflow==1.15.3 && \
     pip --no-cache-dir install \
         wheel \
+        black \
+        isort \
         scipy \
         matplotlib \
         pandas \