anchor.diff:  FROM ubuntu:16.04
   
   #overrides for APT cache
  -
   RUN echo "force-unsafe-io" > /etc/dpkg/dpkg.cfg.d/02apt-speedup
   RUN echo "Acquire::http {No-Cache=True;};" > /etc/apt/apt.conf.d/no-cache
   
  
positive.code:     ssh \
      tar \
      gzip \
      build-essential \
      ffmpeg \
      python3-pip \
  
negative.code: 
  RUN apt update && \
      apt -y install \
      apt-utils \
      software-properties-common \
      python-software-properties \
      wget \
      sudo \
      bash \
  