Daniel Gagan of Forest Mist Software has created a great, easy-to-use build tool for web files. It is available at the ForestMist repository on GitHub.
It comes preconfigured with practical default settings to get you up and running ASAP. Many users will never have to touch a thing, others will choose to create a Feri config file with their preferred settings. Other, more hardcore developers, will quickly learn to harness the unrestricted power of Feri's API.
Keri requires Node version 4.0.0 or greater.