A simple notes API example with a PostgreSQL database.

• index.js - HTTP server with CRUD endpoints for notes
• package.json - Node.js project with pg dependency
• specific.hcl - Specific configuration with database

The specific.hcl defines:

• A PostgreSQL database named "main"
• A build configuration with automatic dependency installation
• A service that runs the Node.js server
• The DATABASE_URL environment variable is automatically injected from the database

• GET /notes - List all notes
• POST /notes - Create a note (body: {"content": "..."})
• GET /health - Health check