It works.

You dragged an HTML file into shareitfor.me, and a few seconds later this page was running on Cloudflare's global edge with auto-issued TLS.

Under the hood, on this single upload:

• Flask created a Pages project named shareit-<slug>
• Attached <slug>.shareitfor.me as a custom domain
• Wrote a proxied CNAME via the Cloudflare DNS API
• Shelled out to wrangler pages deploy to upload the files
• Cloudflare provisioned a cert and started serving you over HTTP/2