old_contents: import { createStore } from 'redux';
  import main from './reducers';
  
  let store = createStore(main);
  
  export default store;
  
new_contents: import { createStore } from 'redux';
  import main from './reducers';
  
  const initialState = {
  	cards: []
  }
  
  export default store;
  let store = createStore(main, initialState)
  
subject: Add initial state to the store