Improve the UI of the /App route page

[subClassy]

UI of the /App page should be improved. All the while maintaining the responsiveness the website. The color scheme, fonts, sizing, etc. should match to that of the rest of the website. Any bootstrap or react template system can be used besides the current one.

[subClassy]

https://blog.bitsrc.io/11-react-component-libraries-you-should-know-178eb1dd6aa4
You can have a look at this article for lightweight components.