chore: add home page with information on local API

src/components/Example.tsx

@@ -0,0 +1,10 @@
+import React from 'react'
+import { getPayload } from 'payload'
+
+const Example: React.FC = async () => {
+  const payload = await getPayload()
+  const url = payload.config.serverURL
+  return <div>The admin panel is running at: {url}</div>
+}
+
+export default Example