Create frontend/src/App.js

frontend/src/App.js

@@ -0,0 +1,19 @@
+import React from 'react';
+
+function App() {
+    const [message, setMessage] = React.useState("");
+
+    React.useEffect(() => {
+        fetch("/api")
+            .then(response => response.json())
+            .then(data => setMessage(data.message));
+    }, []);
+
+    return (
+        <div>
+            <h1>{message}</h1>
+        </div>
+    );
+}
+
+export default App;