anchor.diff:  
   # Now we're going to build our actual application image, which will eventually
   # pull in the static files that were built above.
  -FROM python:3.6.3-slim-stretch
  +FROM pypy:3-6.0.0-slim
   
   # Setup some basic environment variables that are ~never going to change.
   ENV PYTHONUNBUFFERED 1
  
positive.code: # We're going to build our actual application, but not the actual production
  # image that it gets deployed into.
  FROM python:3.6.3-slim-stretch as build
  
  # Define whether we're building a production or a development image. This will
  # generally be used to control whether or not we install our development and
  
negative.code: RUN set -x \
      && apt-get update \
      && apt-get install --no-install-recommends -y \
          build-essential libffi-dev libssl-dev \
          $(if [ "$DEVEL" = "yes" ]; then echo 'libjpeg-dev'; fi)
  
  # We create an /opt directory with a virtual environment in it to store our
  # application in.
  RUN set -x \
      && pypy3 -m venv /opt/linehaul
  
  
  # Now that we've created our virtual environment, we'll go ahead and update
  