Preview web as React app #92
Description
Current solution is not very future proof, it is hard to add new features, modifies existing HTML from the book so it relies on existence.
New solution is to create React web app that will communicate with Epuber's server as API backend.
- to reload book content does not have to reload whole page (-> better keeping scroll position)
- does not modify book's HTML (-> better confidence with preview)
- better handling of errors during build (-> can be shown)
- can show progress during build