build pwa apps
<!--index.html-->
<body>
<div id="root">
<div id="container">
<div class="inner-container">
<div id="header">
<img src="/assets/icon.png" alt="logo" />
<h1>Chat</h1>
</div>
<div id="loading-container">
<img src="/assets/icon.png" alt="logo" id="loader"/>
</div>
</div>
</div>
</div>
</body>
// index.js
ReactDOM.render(
<App />,
document.getElementById('root')
);