Add Celery Flower service for monitoring and management

[MbxrAteeq]

Description

This PR addresses the issue of adding Celery Flower to the project, as outlined in issue #19. The changes include adding the necessary configurations and components for implementing Celery Flower, which allows for better monitoring and management of Celery tasks.

Changes Made

• Added Celery Flower service and configurations to the project
• Implemented necessary changes to ensure compatibility with Celery Flower
• Updated README for accessing the Celery Flower dashboard

Testing Done

• Verified the functionality of Celery Flower locally with and without docker

Related Issue

Resolves #19

[MbxrAteeq]

@asacristani Can you please review this Pull Request? Thanks.