Create HomePage and route

src/App.tsx

 import React, { FC } from 'react';
 import { BrowserRouter as Router, Switch, Route } from 'react-router-dom';
+import { HomePage } from './components/HomePage/HomePage';
 import { AuthUser } from './components/AuthUser/AuthUser';
 
 export const App: FC = () => (
   <Router>
     <div data-testid="App">
       <Switch>
-        <Route exact path="/" component={AuthUser} />
+        <Route path="/auth" component={AuthUser} />
+        <Route exact path="/" component={HomePage} />
       </Switch>
     </div>
   </Router>

src/components/HomePage/HomePage.tsx

+import React, { FC } from 'react';
+
+export const HomePage: FC = () => <div>Welcome</div>;