Added boostrap 4 to project and shared components

src/index.js

@@ -1,6 +1,11 @@
+import 'bootstrap/dist/css/bootstrap.min.css';
+// eslint-disable-next-line
+import $ from 'jquery'; 
+// eslint-disable-next-line
+import Popper from 'popper.js'; 
+import 'bootstrap/dist/js/bootstrap.bundle.min';
 import React from 'react';
 import ReactDOM from 'react-dom';
-import './index.css';
 import App from './components/App';
 import * as serviceWorker from './serviceWorker';