Using a custom domain with GitHub Pages

It took far too long to work out how to do this on the GitHub help pages...

Assumptions:

• I've only tested for personal/user domain i.e. the doc root for http://USERNAME.github.io/.
• You've already have an A (APEX) record for your existing site.
• You've already got a CNAME record that points to the A record.

Instructions

1. Enable custom domain in your repository (settings).
2. Update your A record to point to IP addresses: 192.30.252.153 and 192.30.252.154. Pro-tip: Switch your DNS management to cloudflare if you want super fast switch from your old hosting to GitHub.
3. echo "your-domain-name" > CNAME in the default branch repo. This will be source if you're doing this for a Cobalt site.