add global pet counter to site :3

cf/src/index.ts

@@ -0,0 +1,33 @@
+/**
+ * Welcome to Cloudflare Workers! This is your first worker.
+ *
+ * - Run `npm run dev` in your terminal to start a development server
+ * - Open a browser tab at http://localhost:8787/ to see your worker in action
+ * - Run `npm run deploy` to publish your worker
+ *
+ * Bind resources to your worker in `wrangler.toml`. After adding bindings, a type definition for the
+ * `Env` object can be regenerated with `npm run cf-typegen`.
+ *
+ * Learn more at https://developers.cloudflare.com/workers/
+ */
+
+import { Hono } from 'hono';
+import { cors } from 'hono/cors';
+
+const app = new Hono<{ Bindings: Env }>();
+
+app.use('/api/*', cors());
+
+app.get('/api/pet', async (c) => {
+	return c.json({
+		count: (await c.env.DB.prepare('SELECT count FROM pets').first())!.count,
+	});
+});
+
+app.post('/api/pet', async (c) => {
+	return c.json({
+		count: (await c.env.DB.prepare('UPDATE pets SET count = count + 1 RETURNING count').first())!.count,
+	});
+});
+
+export default app satisfies ExportedHandler<Env>;