공부기록, 2021-08-02(recoil기본세팅)

- recoil 기본세팅
```
import React from 'react';
import ReactDOM from 'react-dom';
import { RecoilRoot } from 'recoil'; // recoil 추가
import './index.css';
import App from './App';

const app = document.getElementById('root');
ReactDOM.render(




,
app
);
```