anchor.diff:  ENV HOME /home/dev
   # copyfiles
   ## vim
  +COPY init.vim $HOME/.vimrc
  +## neovim
   COPY init.vim $HOME/.config/nvim/init.vim
   COPY dein.toml $HOME/.vim/rc/dein.toml
   COPY dein_lazy.toml $HOME/.vim/rc/dein_lazy.toml
  
positive.code:   scikit-learn==0.19.1 \
    scikit-image==0.13.1 \
    flake8==3.5.0
  
  # neovim
  RUN apt-get update && apt-get install -y --no-install-recommends \
  
negative.code:   && rm $HOME/installer.sh
  
  # install plugins
  RUN vim +":silent! call dein#install()" +qall
  RUN nvim +":silent! call dein#install()" +qall
  
  WORKDIR ${HOME}
  