anchor.diff:  WORKDIR /opt/alarmdecoder
   RUN sudo python setup.py install
   
  -#configurations
  -RUN sudo echo "enable_uart=1" >> /boot/config.txt
  -RUN sudo rpi-update
  -
   #install nginx by source
   RUN sudo service nginx stop
   RUN sudo apt-get -y remove nginx nginx-full
   RUN sudo apt-get clean
  -ENV VERSION 1.7.4
  +ENV VERSION 1.12.1
   WORKDIR /home/pi
   RUN curl http://nginx.org/download/nginx-$VERSION.tar.gz | tar zxvf -
   WORKDIR /home/pi/nginx-$VERSION
  
positive.code: 
  RUN sudo rm /etc/default/locale
  
  RUN echo 'LANG="en_US.UTF-8"' | sudo tee -a /etc/default/locale
  RUN echo 'LC_NUMERIC="en_US.UTF-8"' | sudo tee -a /etc/default/locale
  RUN echo 'LC_MONETARY="en_US.UTF-8"' | sudo tee -a /etc/default/locale
  RUN echo 'LC_PAPER="en_US.UTF-8"' | sudo tee -a /etc/default/locale
  RUN echo 'LC_NAME="en_US.UTF-8"' | sudo tee -a /etc/default/locale
  RUN echo 'LC_ADDRESS="en_US.UTF-8"' | sudo tee -a /etc/default/locale
  RUN echo 'LC_TELEPHONE="en_US.UTF-8"' | sudo tee -a /etc/default/locale
  RUN echo 'LC_MEASUREMENT="en_US.UTF-8"' | sudo tee -a /etc/default/locale
  RUN echo 'LC_IDENTIFICATION="en_US.UTF-8"' | sudo tee -a /etc/default/locale
  RUN echo "en_US.UTF-8 UTF-8" | sudo tee -a /etc/locale.gen
  RUN sudo ln -s /etc/locale/alias /usr/share/locale/locale.alias
  #RUN sudo dpkg-reconfigure locales
  RUN sudo locale-gen
  
  RUN sudo pip install setuptools
  #install ser2sock and alarmdecoder python library
  
negative.code:     sendmail \
      sqlite3 \
      git \
      miniupnpc \
      python2.7 \
      python2.7-dev \
  