Summary  
How to scaffold a new Nest.js project using the CLI and start a development server with automatic restarts on code changes.  

General domain of usage  
Web server development (HTTP API backends)


To start working with Nest.js, you need to create a new project. You can do this using the Nest CLI without installing it globally.

Run the following command:

```bash 
npx @nestjs/cli new my-app
```

This will create a new Nest.js application with all required files and dependencies.

You will be asked to choose a package manager. Select the one you prefer and wait for the setup to complete.

Once the project is created, move into the project folder:

```bash 
cd my-app
```

Now start the application:

```bash 
npm run start
```

For development, use:

```bash 
npm run start:dev
```

This command **automatically restarts the server** when you change files.

By default, the server runs on:

```bash 
http://localhost:3000
```

Open this address in your browser, and you will see a simple response from the server.

At this point, you already have a running Nest.js application.


Which command runs the Nest.js app with automatic restart during development?

Learn how to build structured backend applications with Nest.js. Organize your code using controllers, services, and modules, handle requests and data validation, and create a complete API using a scalable architecture.

Set up your first Nest.js application and understand how it is structured. Learn how the main files work together to handle requests and organize backend logic.

Learn how to handle requests in Nest.js using controllers and routes. Define endpoints, work with route and query parameters, and control how your backend responds to client requests.

Learn how to organize backend logic using services. Move business logic out of controllers, structure your code properly, and understand how different parts of your application work together.

Learn how Nest.js organizes applications using modules and dependency injection. Understand how different parts of your backend connect and how to structure your code into scalable, maintainable features.

Learn how to handle and validate data in Nest.js. Work with request body data, define structured DTOs, and ensure incoming data is correct using validation pipes.

Summarize what you have learned throughout the track and reinforce your understanding of backend development. Review key concepts and see how they come together into a complete, structured application.

Creating and Running Your First Nest.js App