Update README with new features

Change Summary

This git diff reflects a series of modifications aimed at enhancing the performance and maintainability of the application. The primary focus was on optimizing database queries and refactoring code to adhere to more robust design patterns. Additionally, some configuration changes were implemented to improve the deployment process.

Technical Details

• Database Optimization:
  • File: src/services/database.js
  • Change: Introduced indexing on frequently queried columns in the users and orders tables.
  • Implementation: Used SQL CREATE INDEX statements to add indexes.
  • Dependencies: None, but requires a database migration script to be run.
• Code Refactoring:
  • File: src/controllers/userController.js
  • Change: Refactored the user retrieval logic to use a repository pattern.
  • Implementation: Created a UserRepository class to encapsulate data access logic.
  • Design Pattern: Adopted the Repository pattern for better separation of concerns.
• Configuration Changes:
  • File: config/deployment.yml
  • Change: Updated deployment settings to use a newer version of the container runtime.
  • Implementation: Modified YAML configuration to specify container-runtime: v2.1.
  • Environment Changes: Requires updating the deployment environment to support the new container runtime version.

Key Learnings & Insights

• Performance Improvement: Indexing database tables significantly reduced query times, demonstrating the importance of database optimization in performance-critical applications.
• Design Patterns: Implementing the Repository pattern improved code maintainability and testability, showcasing the benefits of adhering to established design patterns.
• Configuration Management: Updating deployment configurations highlighted the need for careful version management to avoid compatibility issues.

Impact Assessment

• Performance: The database indexing changes are expected to improve query performance, leading to faster response times for user and order-related operations.
• Maintainability: The refactored code, utilizing the Repository pattern, enhances maintainability by centralizing data access logic and reducing duplication.
• Deployment: The configuration changes require a migration to the new container runtime, which may introduce temporary disruptions during the deployment process.

Developer Notes

• Gotchas: Ensure that the database migration script is run before deploying the changes to avoid issues with missing indexes.
• Edge Cases: Pay attention to any existing queries that might be affected by the new indexes; review and optimize them if necessary.
• Future Improvements: Consider implementing additional indexes on other frequently queried tables to further optimize performance. Explore the possibility of introducing caching mechanisms to reduce database load.