What are the main modules and parts of the Nest.js framework architecture?

Nest.js architecture is based on a modular approach and includes several key components:

• Modules: The main building blocks of the application, which group related components, services, and controllers. Each module encapsulates functionality.

• Controllers: Handle incoming HTTP requests, define routes, and return responses to the client.

• Providers: Business logic that can be injected (dependency injection) into controllers and other services.

• Decorators: Used to define metadata for classes and methods, such as @Module(), @Controller(), @Injectable().

• Middleware and Guards: For request processing, authentication, and authorization.

• Interceptors and Exception Filters: For additional request and error handling.

Thus, Nest.js is built around modules that combine controllers and services, providing a clean and scalable architecture.