add key for the home page links

client/src/scenes/Home/index.js

@@ -15,17 +15,17 @@ class Home extends Component {
                 <hr/>
                 {
                     mainMenuItems.map((menuItem) => {
-                        const { showOnHomePage, title, description, url} = menuItem;
+                        const { id, showOnHomePage, title, description, url} = menuItem;
                         if (showOnHomePage){
-
                             return (
-                                <Message size={'large'}>
+                                <Message key={id} size={'large'}>
                                     <a href={url}><Message.Header>{title}</Message.Header></a>
                                     <br/>
                                     {description}
                                 </Message>
                             );
                         }
+                        return null;
                     })
                 }
             </Container>