anchor.diff:  
   RUN conda install -y -c conda-forge python-lmdb \
           opencv 
  -
  -RUN apt-get install -y libgl1-mesa-glx
   
   RUN conda install -y -c conda-forge numpy
   
  
positive.code: FROM nvidia/cuda:8.0-cudnn6-devel-ubuntu14.04
  # TODO: reduce size and complexity of image.
  
  RUN apt-get update && apt-get install -y \
  
negative.code: 
  
  # -------------------- Debug --------------------
  RUN apt-get update && apt-get install -y vim net-tools
  
  # -------------------- patch --------------------
  # libGL.so.1 might be lost when nvidia driver is installed
  # sudo apt-get install freeglut3-dev build-essential libx11-dev libxmu-dev libxi-dev libgl1-mesa-glx libglu1-mesa libglu1-mesa-dev libglfw3-dev libgles2-mesa-dev
  RUN apt-get install -y libgl1-mesa-glx
  
  
  # -------------------- Others --------------------
  