└ application → Application services layer
└ use_cases → Application business rules
└ actions → External API request actions
└ helpers → Application logic helper functions
└ infrastructure → Frameworks, Drivers, DB, UI, External Interfaces layer
└ config → Application configuration files, utils
└ bootstrap → Application environment setup
└ constants → Application-wide used constants
└ types → Application-wide used type definitions
└ utils → Environment utils
└ interface → Presenters, Controllers and Gateways
└ controllers → Express.js route handlers
└ routers → Express.js routes
└ index.ts → Application's entry point