Refactoring : all scripts in Dockerfiles/python/scripts

• Python image is building with dependancies
• PostgreSQL image is building.
• Refactoring : Python scripts in 'scripts' dir
• Gitlab-ci :
  • building and deploying both of PosgreSQL and Python images
  • both OpenShift deployment and service file are ok.

The Python POD launches a test script test-env.sh that checks python dotenv loading and database access.