code: def set_web_index_page(self, container, page):
          
          headers = {"X-Container-Meta-Web-Index": "%s" % page}
          self.api.cdn_request("/%s" % utils.get_name(container), method="POST",
                  headers=headers)
docs: Sets the header indicating the index page in a container
          when creating a static website.
  
          Note: the container must be CDN-enabled for this to have
          any effect.