Main

Let's get to work on the actual application! Our program takes as a command line argument the website URL we want to crawl (or at least the page we want to start from)

Remember, you can run the program itself using npm:

npm run start BASE_URL

Where BASE_URL is the root URL of the website we want to crawl. For example: https://learnwebscraping.dev/practice/ecommerce/.

Create a main function and call it.

function main() {
  // ?
}

main();

You will need to process command line arguments for this step.

All your main function should do at this point is:

1. If the number of CLI arguments is less than 1, print an error and process.exit with code 1.
2. If the number of CLI arguments is more than 1, print an error and process.exit with code 1.
3. If we have exactly one CLI argument, it's the "baseURL", so print some kind of message letting the user know the crawler is starting at that baseURL and then process.exit with code 0.