
Structure for Express based API server
The Structuresrc contains the whole source code of the api. It is divided into three directories: api, config, and constants. The index.js file acts as the entry point to the application. Constants that are common across environments are defined in the constants.common.js file, while environment-specific constants are defined in the constants.dev.js or constants.prod.js files. Sensitive information like database credentials should not be included in the constants and should be defined in the .env file instead. The config directory contains self-contained config files for different modules in the api. The api directory is where most of the work will be done and is further divided into controllers, middlewares, repository, routes, services, utils, and validations. Each directory has a specific purpose and naming convention. Middlewares handle common functions needed across routes, the repository houses the database queries, and the controllers contain the business logic for specific api paths.
The Structuresrc provides a comprehensive source code for an api. It follows a modular structure with separate directories for different functionalities such as config, constants, api, and more. This structure allows for easy scaling and maintainability of the application. The api directory is where most of the development work will be done, with controllers, middlewares, repository, and other subdirectories containing specific functions and logic. By following the suggested naming conventions and conventions for file organization, developers can build a robust api with clear separation of responsibilities.

Express.js is a simple Node.js framework for single, multi-page, and hybrid web applications.
ESLint is a linter for JavaScript that analyzes code to detect and report on potential problems and errors, as well as enforce consistent code style and best practices, helping developers to write cleaner, more maintainable code.