After installation, run npm install and then run npm start which will open up a preview of the template in your default browser, watch for changes to core template files, and live reload the browser when changes are saved. You can view the gulpfile.js to see which tasks are included with the dev environment.
gulpthe default task that builds everythinggulp watchbrowserSync opens the project in your default browser and live reloads when changes are madegulp csscompiles SCSS files into CSS and minifies the compiled CSSgulp jsminifies the themes JS filegulp vendorcopies dependencies from node_modules to the vendor directory
You must have npm installed globally in order to use this build environment.