We'll take a look at the default code in
index.js in a Workers project. We'll take a second to understand how it works before building the rest of our project.
First will see what our Worker looks like in an actual browser by running
wrangler preview. In a terminal, and we'll check out how Serverless functions in Cloudflare Workers listen for HTTPS requests via the "fetch" event and respond to them by creating and returning a new Response.