Could you add a Demo branch that can access via Github

DropBox is blocked by China GFW, Our Chinese people can only access your demo page by VPN. it's a little bit inconvenience for us.
A Demo branch would be more convenience, we will appreciate you so much :)

Start by inspecting the repository's demo page and how the current Dropbox-hosted demo is produced. Determine the entry point and deployment steps for a GitHub-accessible Demo branch; the work is done when Chinese users can access the demo without relying on Dropbox or a VPN.

Written by the indexing model from the issue text.