text: import React from 'react';
  import { render } from 'react-dom';
  import { ApolloProvider } from 'react-apollo';
  import { BrowserRouter as Router } from 'react-router-dom';
  import client from './app-config/apollo/apollo.client';
  import routeConfigs from './app-config/routes/route.config';
  import Header from './features/header-navigation/header-navigation.component';
  import MainContent from './features/main-content/main-content.component';
  
  const rootContainer = document.getElementById('add-app-root');
  
  render(
    <ApolloProvider client={client}>
      <Router>
        <>
          <Header />
          <MainContent routeConfigs={routeConfigs} />
        </>
      </Router>
    </ApolloProvider>,
    rootContainer,
  );
  