ERPNext_com repo issue

Hello @community,
I am working on the portal so I checked some website reference which contributed by someone.

I can see https://github.com/frappe/erpnext_com . This is the website contributed by frappe technology but I can not find anywhere signup/login page Html or js file.

I also checked https://github.com/frappe/frappebooks_com in this repo login/signup file missing

My question is why those pages not available?

If anyone can share a full website-related app or suggestion how can I do that then it will be a great help.