step-by-step

1. create 5 dirs:
    - actions
    - components
    - constants
    - reducers
    - containers

2. create the files:
    - ./store.js
    - ./reducer.js
    - ./actions/index.js
    - ./constants/index.js

3. open ./index.js
    - import { Provider } from 'react-redux'
    - import the store and history from './store'
    - import the ConnectedRouter from 'connected-react-router'
    - import Route and Switch from 'react-router-dom'
    - Configure the store
    - Surround the root component by the Provider passing it the store
    - Then wrap it by ConnectedRouter passing it the history
    - Wrap all the routes by the Switch
    - Put each page in the app inside a Route component passing it the path and the page component

4. open ./store.js
    - import the following:
        - createStore, applyMiddleware from redux
        - createLogger form redux-logger
        - composeWithDevTools from redux-devtools-extension/developmentOnly
        - rootReducer from ./reducer
        - routerMiddleware from connected-react-router
        - createBrowserHistory from history
        - thunk from redux-thunk
    - create and export the history object
    - init the middleware array with [thunk, routerMiddleware(history)]
    - if in development mode, put the createLogger() middleware in the middlewares
    - export a default function that configures the store taking initState as param
    - the function returns createStore(rootReducer(history), initState, composeWithDevTools(applyMiddleware(middlewares)))

5. open ./reducer.js:
    - import combineReducers from redux
    - import connectRouter from connected-react-router
    - export default a constant function taking the history as param and returns:
        - combineReducers({...reducers, router: connectRouter(history)})


6. Define the constants:
    - Define the API urls
    - Define Custom App constants
    - Define anything that could lead to mispelling errors as constant

7. Define the actions:
    - Select Category
    - Select Language
    - Fetch Configurations
    - Fetch Genres
    - Search Movies
    - Fetch Movies
    - Fetch Movie
    - Fetch Reviews