docs: Express Testing & Debugging

[KhaliLounis]

📌 Description

Define a structured approach for testing and debugging our applications, ensuring consistent and reliable code quality.

📝 Content to Cover

• Unit Testing → Writing tests with Jest & Supertest
• Integration Testing → Enhancing reliability through comprehensive tests
• Mocking → Using mocks for external services during testing
• API Documentation → Generating with Swagger
• Debugging Tools → Utilizing Postman and VS Code Debugger

✅ Task Checklist

• Document how to write unit tests with Jest & Supertest
• Include guidelines for integration testing
• Recommend mocking strategies for external APIs
• Explain the usage of Swagger for API documentation
• Suggest tools and workflows for efficient debugging