Wrapping our app inside a <BrowserRouter> component

index.js

import React from 'react';
import ReactDOM from 'react-dom';
import App from './App';
import registerServiceWorker from './registerServiceWorker';
import 'semantic-ui-css/semantic.min.css';
import {BrowserRouter} from 'react-router-dom';

ReactDOM.render(
  <BrowserRouter>
    <App/>
  </BrowserRouter>, document.getElementById('root'));
registerServiceWorker();