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NPM

Now that you've got node working, its important to understand that... you probably won't use it directly very often. Instead, you'll use npm (Node Package Manager) to install and manage packages.

npm is a package manager for JavaScript. It's the world's largest software registry, with over 1.3 million packages of code. It's the home of many useful libraries such as:

If you're familiar with Python, npm is similar to pip or uv. If you're familiar with Go, npm is similar to go get.

Assignment

Run npm init in the heifer directory and follow the prompts to create a new package.json file.

It's fine to just accept the defaults. You can run npm init -y to do that - it creates a basic package.json with common defaults.

The package.json file is what Node.js uses to manage dependencies, scripts, and other metadata about your project.

Edit the main.js file so that it prints "moo!" to the console.
Edit the "scripts" section of your package.json file:
1. Remove the "test" script.
2. Add a new script called "start" that runs node main.js.
3. Next run npm run start to test it out.

The scripts section of the package.json file is where you can define custom scripts that can be run with npm run <script-name>.

Run and submit the CLI tests.