And followed the instructions, however it was basically impossible to get it to run. NPM showed several warnings about dependencies being out of date and bower being called incorrectly (it shows the bower help)
D:\dev\docs>gulp
[16:34:42] Using gulpfile D:\dev\docs\gulpfile.js
[16:34:42] Starting 'clean'...
[16:34:42] Starting 'jshint'...
[16:34:42] Finished 'clean' after 213 ms
[16:34:42] Finished 'jshint' after 363 ms
[16:34:42] Starting 'default'...
[16:34:42] Starting 'style'...
[16:34:42] Starting 'images'...
[16:34:43] Starting 'vulcanize'...
[16:34:43] Starting 'vulcanize-demos'...
[16:34:43] Starting 'jshint'...
ERROR finding /dev/docs/app/bower_components/iron-doc-viewer/iron-doc-viewer.html
ERROR finding /dev/docs/app/bower_components/iron-flex-layout/iron-flex-layout-classes.html
ERROR finding /dev/docs/app/bower_components/iron-icon/iron-icon.html
ERROR finding /dev/docs/app/bower_components/paper-button/paper-button.html
ERROR finding /dev/docs/app/bower_components/polymer/polymer.html
ERROR finding /dev/docs/app/bower_components/google-youtube/google-youtube.html
ERROR finding /dev/docs/app/bower_components/webcomponentsjs/webcomponents-lite.min.js
ERROR finding /dev/docs/app/bower_components/google-map/google-map.html
ERROR finding /dev/docs/app/bower_components/paper-styles/typography.html
ERROR finding /dev/docs/app/bower_components/app-layout/helpers/helpers.html
ERROR finding /dev/docs/app/bower_components/iron-iconset-svg/iron-iconset-svg.html
ERROR finding /dev/docs/app/bower_components/paper-tabs/paper-tabs.html
ERROR finding /dev/docs/app/bower_components/paper-tabs/paper-tab.html
ERROR finding /dev/docs/app/bower_components/iron-pages/iron-pages.html
ERROR finding /dev/docs/app/bower_components/app-layout/app-drawer/app-drawer.html
ERROR finding /dev/docs/app/bower_components/app-layout/app-header/app-header.html
ERROR finding /dev/docs/app/bower_components/app-route/app-location.html
ERROR finding /dev/docs/app/bower_components/app-route/app-route.html
ERROR finding /dev/docs/app/bower_components/iron-ajax/iron-ajax.html
ERROR finding /dev/docs/app/bower_components/iron-collapse/iron-collapse.html
ERROR finding /dev/docs/app/bower_components/iron-media-query/iron-media-query.html
ERROR finding /dev/docs/app/bower_components/iron-selector/iron-selector.html
ERROR finding /dev/docs/app/bower_components/paper-icon-button/paper-icon-button.html
[16:34:44] Finished 'jshint' after 577 ms
[16:34:44] Starting 'js'...
[16:34:44] Finished 'js' after 110 ms
[16:34:44] Finished 'style' after 1.75 s
[16:35:08] gulp-imagemin: Minified 84 images (saved 4.64 MB - 33%)
[16:35:09] Finished 'images' after 26 s
Finally can't this run in any web server? It's really annoying to have to install App Engine. And it's even more annoying because App Engine couldn't correctly server the dist directory. The command: