HI There
Excellent tutorial!
A small problem I had using a mac (not sure it is connected 
) is using the bulma module.
The following did not work for me :
import ‘./node_modules/bulma/css/bulma.css’;
This one did (notice the double dots instead the single one) :
import ‘…/node_modules/bulma/css/bulma.css’;
Thanks very much and best regards !