Posts formats is _posts/YYYY-MM-DD-title.md. Jekyll will then proceed by processing them into static html files.

I’ve connected the URL samusz.muszlak.com to the github page’s url by adding a CNAME record in my registar’s record and adding it in the Custom Domain section in GitHub page.

For now, the Settings > Pages I’ve checked on the Enforce HTTS in the Custom Domain section. I’ll wait to see if the https will work once this record is propagated in the DNS servers.