Added modules with actions, reducer, selectors and structured style

src/app/main.js

@@ -0,0 +1,24 @@
+import React from 'react';
+import ReactDOM from 'react-dom';
+import thunk from 'redux-thunk'
+import Immutable from 'immutable'
+import {createStore, applyMiddleware, compose} from 'redux'
+// import * as serviceWorker from '../serviceWorker';
+import Router from './router';
+import reducer from './reducer'
+import 'bootstrap/dist/css/bootstrap.min.css'
+import './index.scss'
+
+const composeEnhancers =
+  typeof window === 'object' &&
+  window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__ ?   
+    window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__({
+        serialize: { // prettier-ignore
+            immutable: Immutable
+        }
+    }) : compose;
+const store = createStore(reducer, composeEnhancers(applyMiddleware(thunk)))
+
+ReactDOM.render(<Router store={store} />, document.getElementById('root'));
+
+// serviceWorker.unregister();