Revert "Removed the npm packages from the ruby build agent cookbook, as they can be set directly."

This reverts commit f1075c2ffd49f2dc5158c6c484f667be188514cf.
Removed the npm packages from the ruby build agent cookbook, as they can be set directly. (reverted from commit f1075c2ffd49f2dc5158c6c484f667be188514cf)