anchor.diff:  RUN pip install --upgrade pip virtualenv
   
   # Copy the source code over
  +WORKDIR /src/ims
  +
   COPY ./COPYRIGHT.rst  ./
   COPY ./LICENSE.txt    ./
   COPY ./pyproject.toml ./
  
positive.code: # -----------------------------------------------------------------------------
  # This stage builds the build container.
  # -----------------------------------------------------------------------------
  
  WORKDIR /src/ims
  
  # Install compiler toolchain and libraries.
  RUN apk add build-base libffi-dev
  
negative.code: COPY ./src/           ./src/
  
  # Install the application
  RUN install -o daemon -g daemon -d /srv/ims
  USER daemon:daemon
  RUN virtualenv /srv/ims
  RUN /srv/ims/bin/pip --no-cache-dir install /src/ims
  
  
  # -----------------------------------------------------------------------------
  