chatRedux/frontend/src/index.js

import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import App from './App';
import {Provider} from 'react-redux';
import {store} from './store'
import * as serviceWorkerRegistration from './serviceWorkerRegistration';

ReactDOM.render(
    <Provider store={store}> 
        <App/>
    </Provider>
        ,document.getElementById('root')
);

serviceWorkerRegistration.register();