fix eslint errors

src/index.jsx

@@ -0,0 +1,19 @@
+import React from 'react';
+import { render } from 'react-dom';
+
+import App from './App';
+import api from './api';
+
+import '@patternfly/react-core/dist/styles/base.css';
+import '@patternfly/patternfly-next/patternfly.css';
+
+import './app.scss';
+
+const el = document.getElementById('app');
+
+api.getRoot()
+  .then(({ data }) => {
+    const { custom_logo, custom_login_info } = data;
+
+    render(<App logo={custom_logo} loginInfo={custom_login_info} />, el);
+  });