A freshly published site lives at an address like https://my-account.github.io/my-site/. Here is how to put it on a domain of your own instead.
1. Check your hosting is set up
In Site Settings, Hosting should be GitHub and Site Url should be filled in. If not, use Change Hosting next to the Hosting field and follow the steps.
2. Open the public directory
Click Open Public Dir. Your site's published files open in a folder window. If nothing appears, change your PRSS data directory in App Settings and try again.
3. Add a CNAME file
In that folder, create a file named CNAME, with no extension, containing only your domain name.
4. Point the domain at your site
Register the domain you wrote in the CNAME file and set up its DNS records. GitHub's guide for configuring an apex domain lists the exact records; Cloudflare works well as a registrar.
5. Update Site Url
Back in Site Settings, set Site Url to the full URL of that domain — prss.co in the CNAME file means https://prss.co/ here.
6. Publish and confirm
Publish your site, then open the Publish Log and check the repository root: the CNAME file should be there. Your site appears on the new domain shortly after.
