index.js

// index.js
import React from 'react'
import { render } from 'react-dom'
import { configureStore } from '@reduxjs/toolkit'
import { Provider } from 'react-redux'

import App from './App'
import rootReducer from './slices'

import './index.css'

const store = configureStore({ reducer: rootReducer })

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