client/store/configureStore.prod.js
import { createStore, applyMiddleware, compose } from 'redux';
import thunk from 'redux-thunk';
import rootReducer from '../reducers';
const finalCreateStore = compose(
applyMiddleware(thunk)
)(createStore);
module.exports = function configureStore(initialState) {
return finalCreateStore(rootReducer, initialState);
};