anchor.diff:  COPY . .
   # This might look a bit alien but it's copying in everything from
   # the current directory relative to the Dockerfile, over to the
  -# /my_dockerized_app folder inside of the Docker image.
  +# /orats_base folder inside of the Docker image.
   #
   # We can get away with using the . for the second argument because
   # this is how the unix command cp (copy) works. It stands for the
  
positive.code: COPY Gemfile Gemfile.lock ./
  # This is going to copy in the Gemfile and Gemfile.lock from our
  # work station at a path relative to the Dockerfile to the
  # my_dockerized_app/ path inside of the Docker image.
  #
  # It copies it to /my_dockerized_app because of the WORKDIR being set.
  #
  # We copy in our Gemfile before the main app because Docker is
  # smart enough to cache "layers" when you build a Docker image.
  
negative.code: # packages to ensure that we can compile assets (nodejs) and
  # communicate with PostgreSQL (libpq-dev).
  
  ENV INSTALL_PATH /orats_base
  # The name of the application is orats_base and while there
  # is no standard on where your project should live inside of the Docker
  # image, I like to put it in the root of the image and name it
  # after the project.
  