[jupyterhub] add vim plugin

jupyterhub/Dockerfile

@@ -31,7 +31,8 @@ RUN python${PYTHON_VERSION} -m pip --no-cache-dir install \
     python${PYTHON_VERSION} -m jupyter labextension install \
         jupyter-webrtc \
         ipyvolume \
-        jupyter-threejs
+        jupyter-threejs \
+        jupyterlab_vim
 
 RUN mkdir -p ~/.venv && \
     python${PYTHON_VERSION} -m venv ~/.venv/robofish && \