Add customer registration API

[geek-ashkar]

Description

This Pull Request adds the initial backend foundation for the BookMyVenue MVP authentication module. It includes PostgreSQL database connection setup, users table schema, and a customer registration API.

Phase Category

• Phase 1: MVP Submission (Base Foundation)
• Implemented API:

POST /auth/register/customer

This API accepts customer name, email, and password, checks whether the email already exists, hashes the password using bcrypt, and stores the customer in the users table with role customer and status active.

Tech Stack (For Phase 1 MVP Submissions)

Frontend: React + TypeScript
Backend: Node.js + Express + TypeScript
Database: PostgreSQL

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• [1] New feature / Module (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Checklist:

• [1 ] I have read the Contribution Guidelines.
• [ 1] My code follows the community spirit and standards of the WeCode community.
• [ 1] I have performed a self-review of my own code.
• [ 1] I have commented my code, particularly in hard-to-understand areas.
• [ 1] My changes generate no new warnings or errors.

AI Disclosure

• I did NOT use AI tools to generate this code.
• [ 1 ] I used AI tools ( ChatGPT) to help write this code, and I have fully reviewed, tested, and understand the output.