Update App.js

Author: DEVUCP

front-end/src/App.js

@@ -10,7 +10,7 @@ function App() {
 
 
   return (
-    <div className="App" id="testApp">
+    <div className="App" data-testid="testApp">
       <Navbar></Navbar>
       {/* <div className='sidebar-container'>
         <div class="btn-group-horizontal" role="group" aria-label="Vertical radio toggle button group">