Adaptation for an AuRa wide docker setup

• Moved all local settings to an .env file, removing the need for a local_settings.py
• Adapted docker setup for dev and prod targets as they will be used in an AuRa wide docke deployment
• Added a management command to create an OIDC client
• Adopted README to new setup and added section on OIDC client setup

changed milestone to %1.0-alpha2 — Precise Pheasant

mentioned in issue #38 (closed)

approved this merge request

mentioned in commit fde5dfd6

merged