Explaining NestJS core concepts: Modules, Controllers, Services, and DI

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NestJS is a Node.js framework using TypeScript to structure server-side applications. It organizes code into distinct components like Modules, Controllers, and Providers. A restaurant analogy is used to illustrate how Controllers handle requests, Services contain logic, and Modules group features. The framework's Dependency Injection container manages how these components are connected and supplied.

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