establishing layout for mern stack

client/src/App.js

@@ -0,0 +1,18 @@
+import './App.css';
+import { Routes, Route, BrowserRouter } from 'react-router-dom';
+
+import Welcome from './components/Welcome';
+
+function App() {
+  return (
+    <div className="App">
+      <BrowserRouter>
+          <Routes>
+            <Route path="/" element={<Welcome />}/>
+          </Routes>
+        </BrowserRouter>
+      </div>
+  );
+}
+
+export default App;