Optimize the Celery system for workers to process multiple tasks in parallel

[namvnngu]

• The Celery worker has not been implemented to run in the background as a daemon, since for testing and development, running it by command with docker-compose is sufficient
• The Celery system should be optimized since only one worker is responsible for processing the tasks at the moment.

[namvnngu]

Optimize the Celery system for works to process multiple tasks in parallel

[namvnngu]

Adding celery workers in the workflow of Django API.