Update index.html

[amdacccache]

I don't actually have any recs for the front end. I think your design is really cool but the app is not intuitive at all. I have no idea how to use the app. How does a user change their account balance? There is no clear guidance or intuition on how to use the app. I would recommend either a landing page (which could be nice regardless) that breaks down how to use the app, or clear direction on the dashboard.

[Ziqing19]

Thank you for your review!
There is an question mark icon on the navbar that provides some instructions on how to use the application. And you remind me that I should provide a guest account for reviewers. Apology for my carelessness. Thank you for your review！

And for fontawesome icon quesion: sure.
It is a common icon provider just like google font. Please check their license here: https://fontawesome.com/license