Improve automation for dstopic/ds sh build process

Right now, building a new version of dstopic is a bit of a manual process. You have to cd into the dstopic dir, make sure to have npm installed, and then you need to do `npm run build`, and _then_ you can build a new ds release.

Until such a time when ds can host itself and manage the dstopic distro itself, we need to have a better build process for this, hopefully automating more of it so we don't forget these steps?