The primary gulp file is located at build/gulpfile.coffee. It describes all build tasks.

Build configuration files are located at build/config/ and describe how this project and it's various assets should be assembled/compiled.

This configuration file describes the build parameters and options which are used by gulp and gulp build utilities, as well as describing the various source, destination, and asset directories. Build configuration changes should be made here whenever possible instead of within the gulpfile.

This configuration file describes Webpack-specific configuration options. Changes to the Webpack build structure (such as adding loaders, etc.) should be made here.

You can test your project on many different operating systems and browsers using SauceLabs. The site doesn't need to be accessible via the internet if you install Sauce Connect. See https://wiki.saucelabs.com/display/DOCS/Setting+Up+Sauce+Connect for more information.