Create API documentation - README.md

[frasermuller]

explain each endpoint, workflows, and how they work.

[Corangit]

Step-by-Step Deployment and Handover Guide
Provide a comprehensive guide that allows anyone to deploy and maintain your system. This should include:

Installation Instructions: Step-by-step setup procedures for running the system using Docker.

Dependencies: A complete list of required tools, libraries, and services (with version details).

Maintenance Requirements: Details on ongoing maintenance, including:

Account credentials (if applicable)

Database management procedures

Configuration of external APIs or service