Migrated App test to react testing library

src/app/App.tsx

@@ -1,7 +1,7 @@
 import { useEffect, FC } from 'react';
 import { Route, Routes, useLocation } from 'react-router-dom';
 import classNames from 'classnames';
-import NotFound from '../common/NotFound';
+import { NotFound } from '../common/NotFound';
 import { ServersMap } from '../servers/data';
 import { Settings } from '../settings/reducers/settings';
 import { changeThemeInMarkup } from '../utils/theme';
@@ -17,7 +17,7 @@ interface AppProps {
   appUpdated: boolean;
 }
 
-const App = (
+export const App = (
   MainHeader: FC,
   Home: FC,
   MenuLayout: FC,
@@ -65,5 +65,3 @@ const App = (
     </div>
   );
 };
-
-export default App;

src/app/services/provideServices.ts

@@ -1,6 +1,6 @@
 import Bottle from 'bottlejs';
 import { appUpdateAvailable, resetAppUpdate } from '../reducers/appUpdates';
-import App from '../App';
+import { App } from '../App';
 import { ConnectDecorator } from '../../container/types';
 
 const provideServices = (bottle: Bottle, connect: ConnectDecorator) => {