Print to console when generating default job config

Dockerfile

 # ==================================== BASE ====================================
 ARG INSTALL_PYTHON_VERSION=${INSTALL_PYTHON_VERSION:-3.7}
-FROM python:${INSTALL_PYTHON_VERSION}-slim-buster AS base
+ARG CI_DEPENDENCY_PROXY_GROUP_IMAGE_PREFIX=${CI_DEPENDENCY_PROXY_GROUP_IMAGE_PREFIX:-'gitlab.ebi.ac.uk/chembl/dependency_proxy/containers'}
+FROM ${CI_DEPENDENCY_PROXY_GROUP_IMAGE_PREFIX}/python:${INSTALL_PYTHON_VERSION}-slim-buster AS base
 ENV CONFIG_FILE_PATH=${CONFIG_FILE_PATH:-'/etc/run_config/RUN_CONFIG.yml'}
 ENV GUNICORN_CONFIG_FILE_PATH=${GUNICORN_CONFIG_FILE_PATH:-'/etc/gunicorn_config/GUNICORN_CONFIG.py'}