Return small HTML page
Deliver an HTML page from an HTML string directly inside the Worker script.
export default {  async fetch(request) {    const html = `<!DOCTYPE html>		<body>		  <h1>Hello World</h1>		  <p>This markup was generated by a Cloudflare Worker.</p>		</body>`;
    return new Response(html, {      headers: {        "content-type": "text/html;charset=UTF-8",      },    });  },
};
const handler: ExportedHandler = {  async fetch(request: Request) {    const html = `<!DOCTYPE html>		<body>		  <h1>Hello World</h1>		  <p>This markup was generated by a Cloudflare Worker.</p>		</body>`;
    return new Response(html, {      headers: {        "content-type": "text/html;charset=UTF-8",      },    });  },
};
export default handler;