Merged requested to merge MariaV/gitlab-lobby:move_secret into main
Goal: Improve security by moving SECRET_KEY from settings.py to an outside file, src/settings.json.
- Added secrets.json inside of /src with a blank string for SECRET_KEY.
- Updated settings.py with function (get_secrets), to read SECRET_KEY from settings.json and give exception if missing.
- Updated README to reflect changes.
- Added secrets.json to gitgnore.