Rewrite static resources

[srevinsaju]

The static (HTML, CSS, JS) libraries, following #37 , #35 , #28, #34, and other performance issues, it is important to rewrite the Appstore again in a more performance optimized Javascript framework.

Possibly, by using the powerful, but new CSS library Bulma, replacing the Bootstrap 4 library.

[srevinsaju]

I do not plan to fix it now either; and it seems we can work without Bulma too

[srevinsaju]

Done! nvm 😄