Client assets build dependencies

[michalkleiner]

Thanks for the great module, @colintucker!

Is there a way how I can update the source JS and compile it locally? At the moment the CSS bundle loads a couple of dependencies that are not a part of the repository and it's unclear how/where to obtain them, specifically

~silverware-theme
~bootstrap
~calendar-admin

defined in bundle.scss.

I did yarn install and ran yarn build, getting build failures on those unresolvable dependencies.

Thanks for any hints!