Create routes/favorites.js file

Create package.json file for Node.js backend with dependencies

Create .gitignore file to ignore node_modules, .env files, and other common development artifacts

Add .env.example file with environment variables

Create server.js as the main entry point for the Express backend

Create config/database.js to configure PostgreSQL database connection

Add JWT authentication middleware

Create routes/auth.js for authentication endpoints

Create README.md file with comprehensive project documentation

Create routes/cards.js for credit card comparison endpoints

Create routes/reviews.js for user reviews endpoints

Define User database model

Create CreditCard database model

Create Review.js model file

Create Favorite model