HOW DO YOU SAVE A HTML DOCUMENT?

How do you save a HTML document. Every time I save it and upload it on the downloads page and test it out, I get an error page saying this

" You're seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard 404 page. "

Can any one help me out?

I'm trying to upload a download, and I guess when a download is more than 100GB, you have to upload a HTML.