anchor.diff:  # Increase the value below to force renstalling of all dependencies
   ENV DEPENDENCIES_EPOCH_NUMBER=${DEPENDENCIES_EPOCH_NUMBER}
   
  -# Install curl and gnupg2 - needed to download nodejs in next step
  +# Install curl and gnupg2 - needed to download nodejs in the next step
   RUN apt-get update \
       && apt-get install -y --no-install-recommends \
              curl gnupg2 \
  
positive.code: ARG APT_DEPS_IMAGE="airflow-apt-deps"
  ARG PYTHON_BASE_IMAGE="python:3.6-slim"
  ############################################################################################################
  # This is base image with APT dependencies needed by Airflow. It is based on a python slim image
  # Parameters:
  #    PYTHON_BASE_IMAGE - base python image (python:x.y-slim)
  ############################################################################################################
  
negative.code: 
  RUN pip install --upgrade pip==${PIP_VERSION}
  
  # Airflow sources change frequently but dependency configuration won't change that often
  # We copy setup.py and other files needed to perform setup of dependencies
  # This way cache here will only be invalidated if any of the
  # version/setup configuration change but not when airflow sources change
  