client/src

index.js

// other imports
...

// Adding redux and reducers 
import { createStore } from 'redux'
import { Provider } from 'react-redux'
import rootReducer from './reducers'

// Creates our store to use our reducers and the chrome extension to debug the redux store
const store = createStore(
    rootReducer,
    window.__REDUX_DEVTOOLS_EXTENSION__ && window.__REDUX_DEVTOOLS_EXTENSION__()
);

ReactDOM.render(
    // Connects the store to our application
    <Provider store={store}>
        <Header/>
        <App />
    </Provider>,
    document.getElementById('root')
);