In this documentation, there is a link Developing an SAP Fiori Application.
But when I clicked on it, it show "403 : You don't have rights to view this page."
Another link is Deploy to the SAPUI5 ABAP Repository - SAP Help Portal (from google search by "abap-deploy")
It also show "403 : You don't have rights to view this page."
I have no idea why the documentations of this topic disappear at the same time...