message: Bumped ubuntu version to 18.04
  changed to pip packages to use notebook  instead of ipython-notebook
diff: -FROM ubuntu:16.04
  +FROM ubuntu:18.04
  RUN useradd -ms /bin/bash indy
  @@ -17,7 +17,7 @@ WORKDIR /home/indy
  RUN pip3 install --upgrade pip
  RUN pip3 install -U \
  pip \
  - ipython-notebook \
  + notebook \
  ipython==7.9 \
  setuptools \
  jupyter \
  