Did you know you could easily run an HTML page from Github?
The solution is rawgithub !
Just go to the file you would like to run and click on raw button. This will show the page but served as text/plain and not text/html.
So that you run the file as text/html on the url just delete the dot from rawgithub.
Very nice to share code or show some demos, but, beware, this is not for production! This is not an alternative to hosting services!