photo-viewer-react/src/App.tsx

import { BrowserRouter, Routes, Route } from 'react-router-dom';
import './App.css';
import Gallery from './Gallery/index';

function App() {
  return (
    <BrowserRouter>
      <Routes>
        <Route path="/photos/*" element={<Gallery />} />
      </Routes>
    </BrowserRouter>
  );
}

export default App;