Step-4 Global style

index.js

import React from 'react';
import ReactDOM from 'react-dom';
import { injectGlobal } from 'styled-components';

import App from './App';

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

// Global style
// eslint-disable-next-line
injectGlobal`
  body {
    background-color: ghostwhite;
    padding: 0;
    margin: 0;
    font-family: cursive;
  }
`