Express, OpenAI, Supabase

src/configs

• API keys
• env vars
• db connection params

src/controllers

• receive incoming requests
• handlers for routes
• process them using services
• send responses

src/middlewares

• perform operations on incoming requests before they reach route handler
• ie. auth, logging, parsing, error handling

src/models

• data models (structure)
• db schemas

src/routes

• define routes and related routes
• define the HTTP methods (GET, POST, PUT, PATCH, DELETE)

src/services

• business logic
• external services
• reusable functionality
• db queries

src/utils

• date formatting
• generate unique IDs
• encryption
• validation