Count detections in images with yolo model. E.g. count people in images and store result in database.

1. Setup PostgreSQL database by using setup.sql script
2. Fill in Database credentials inside the main.py script.
3. Add Webcam URLs to webcam_urls table.
4. Download yolo weights and config from https://pjreddie.com/darknet/yolo/
5. Schedule script to run repeatedly.