chore: lint fixes

src/containers/EmptyCourse/index.jsx

@@ -1,13 +1,13 @@
 import React from 'react';
-import messages from './messages';
 import { FormattedMessage } from '@edx/frontend-platform/i18n';
-import { Button } from '@edx/paragon'
+import { Button } from '@edx/paragon';
+import messages from './messages';
 
 import './index.scss';
 
 export const EmptyCourse = () => (
-  <div className='empty-course'>
-    <img src='empty-course.svg' />
+  <div className="empty-course">
+    <img src="empty-course.svg" alt="empty course banner" />
     <h1>
       <FormattedMessage {...messages.lookingForChallengePrompt} />
     </h1>