Added react router

frontend/src/index.js

@@ -1,8 +1,23 @@
 import React from 'react';
 import ReactDOM from 'react-dom';
+import { BrowserRouter as Router, Route } from 'react-router-dom'
 import './index.css';
 import App from './components/App';
 import registerServiceWorker from './registerServiceWorker';
+import Inbox from './components/App/Inbox/index';
+import MyTask from './components/App/Mytask/index';
+import Dashboard from './components/App/Dashboard/index';
+import Dummy from './components/App/Dummy/index';
 
-ReactDOM.render(<App />, document.getElementById('root'));
+ReactDOM.render(
+    <Router>
+        <div>
+            <Route exact path='/' component={App} />
+            <Route exact path="/mytask" component={MyTask} />
+            <Route exact path="/inbox" component={Inbox} />
+            <Route exact path="/dashboard" component={Dashboard} />
+        </div>
+    </Router>
+    ,
+    document.getElementById('root'));
 registerServiceWorker();