Deploy.

node_modules/wrangler/templates/new-worker.js

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+/**
+ * Welcome to Cloudflare Workers! This is your first worker.
+ *
+ * - Run `npx wrangler dev src/index.js` in your terminal to start a development server
+ * - Open a browser tab at http://localhost:8787/ to see your worker in action
+ * - Run `npx wrangler publish src/index.js --name my-worker` to publish your worker
+ *
+ * Learn more at https://developers.cloudflare.com/workers/
+ */
+
+export default {
+	async fetch(request, env, ctx) {
+		return new Response("Hello World!");
+	},
+};