anchor.diff:  RUN apt-get -y install python3-pip python3-tk git
   RUN apt-get -y upgrade
   RUN ln -s /usr/bin/pip3 /usr/bin/pip
  +RUN ## disable cache
   RUN pip3 install git+https://github.com/nosix/raspberry-gpio-emulator/
   
   ENV USER=pi
  
positive.code: WORKDIR $HOME
  RUN mkdir samples
  COPY samples/*.py samples/
  RUN mkdir work
  RUN echo "alias python=python3.6" > .bashrc
  
negative.code: #
  # $ docker build -t nosix/raspberry-gpio-emulator:<version> .
  # $ docker run -p 6080:80 nosix/raspberry-gpio-emulator:<version>
  # Open http://localhost:6080/
  # LXTerminal$ python samples/sample_bcm.py  # TODO write test suite
  # $ docker push nosix/raspberry-gpio-emulator:<version>
  #
  FROM dorowu/ubuntu-desktop-lxde-vnc
  MAINTAINER nosix
  
  