is-cool-me/register ? reverse-engineered prompt

Build me a simple site for registering free subdomains for personal sites and open source projects.

I want people to sign in with GitHub, check if a subdomain name is available, pick a zone, choose a DNS record type like CNAME, A, or AAAA, and enter the target. They should also be able to turn on Cloudflare proxy if they want. After they submit, the app should create a pull request or request for review, and a maintainer can approve it before the subdomain goes live.

Make it feel clean and easy to use, with a landing page that explains what the service is and a clear register flow. Include support for the two available domains, and make sure the DNS settings are handled correctly. If you need to look up current docs online, go ahead.