anchor.diff:      libxml2-dev \
       libxmlsec1-dev \
       libxslt1-dev \
  +    software-properties-common \
       swig \
       # openedx requirements
       gettext \
  
positive.code: ENV SETTINGS production
  RUN mkdir -p /edx/etc/
  
  ENV VIRTUAL_ENV=/venv
  RUN python3.8 -m venv $VIRTUAL_ENV
  ENV PATH="$VIRTUAL_ENV/bin:$PATH"
  
  # Install Python requirements
  RUN pip install pip==20.2.3
  COPY setup.py setup.py
  COPY common common
  COPY openedx openedx
  
negative.code: 
  # Install system requirements
  RUN apt-get update && \
      # Global requirements
      DEBIAN_FRONTEND=noninteractive apt-get install --yes \
      build-essential \
  