Add build guide & upload libary to npm

[BennyAlex]

Hello,

I tried using the cloned project, but I got some errors (when using node >17)
You using some old versions of "rollup-plugin-typescript2" & "typescript", updating these to the latest versions fixed those.
See: ezolenko/rollup-plugin-typescript2#286

But when starting the watcher, I noticed, there is no index.html file.
So how do you see the project live?

Another nice feature would be, if you could add the libary to npm for easier installation and management