- Added an example .env file, where all variables start with `OBS_`
- `OBS_` variables are handled by the portal as configuration variables
- Uncomment some variables in the config.py, since the config.py overrides the env-vars
- Use env-vars and env-file in the docker-compose.yaml
- Add the worker to the docker-compose.yaml
- Add KeyCloak with its own postgres to the docker-compose.yaml
