Can I apply the domain to Github Page?

I was curious after reading the question, so I did it, and it's working well

https://help.github.com/articles/setting-up-your-pages-site-repository/ I reported it, but in a nutshell

1) Preparing for GitHub

2) DNS settings

Type: CNAME / NAME: wwww / value: Nickname.github.io

.

1) Preparing for GitHub

2) DNS

3) (Optional) To connect additionally to www.xxx.kr

Connection was confirmed quickly within 5-10 minutes of setting the CloudFlare criteria~