anchor.diff:  COPY . /usr/local/src/xblock-sdk
   WORKDIR /usr/local/src/xblock-sdk
   
  -RUN ln -s /usr/bin/python3.8 /usr/bin/python && \
  -    /usr/bin/python3 -m pip install --upgrade pip && \
  -    pip install -r /usr/local/src/xblock-sdk/requirements/dev.txt
  +ENV VIRTUAL_ENV=/venvs/xblock-sdk
  +RUN python3.8 -m venv $VIRTUAL_ENV
  +ENV PATH="$VIRTUAL_ENV/bin:$PATH"
  +
  +RUN pip install --upgrade pip && pip install -r /usr/local/src/xblock-sdk/requirements/dev.txt
   
   RUN curl -sL https://deb.nodesource.com/setup_14.x -o /tmp/nodejs-setup && \
       /bin/bash /tmp/nodejs-setup && \
  
positive.code:     zlib1g-dev \
      python3 \
      python3-dev \
      python3-pip && \
      pip3 install --upgrade pip setuptools && \
      rm -rf /var/lib/apt/lists/*
  
negative.code:     make install
  
  EXPOSE 8000
  ENTRYPOINT ["python", "manage.py"]
  CMD ["runserver", "0.0.0.0:8000"]
  