If you can’t create a local web server for any reason—too lazy, too many network restrictions, what’s a web server?—you can use a public Dropbox folder instead.
Just drop your template into the “Public” folder inside your Dropbox directory. Then right-click on your manifest file (manifest.json) and select Dropbox > Copy Public Link. You should get a URL like this:
Enter this URL in the Workshop app and you’re off to the races! You can also view your HTML pages in Chrome and debug them with the Developer Tools.
Warning! Your files will be accessible to anyone who knows the URL, so share wisely.