wsclock_front/src/index.js

import * as React from 'react';
import * as ReactDOM from 'react-dom';
import Config from './config.json';
import Clock from './Clock';
import './index.css'

ReactDOM.render(
  <React.StrictMode>
    <Clock wsurl={Config.WS_URL}/>
  </React.StrictMode>,
  document.getElementById('root')
);