Yes, that is a good place to start and I used it alot when customizing our normal login page. But now I wanted to do the same with the page that super-gluu generates to support MFA. (See attached link)
But when I read the page you send me to I found this:
Each such tree is placed in the configuration directory of the corresponding Gluu component (only customization of oxAuth and oxTrust pages is supported at the moment by this feature).
So maybe the custom directory tree option isnt supported for super-gluu?
Then i have to alter the war file i guess.
If the directory tree option work, i just need the url to where to put the login.xhtml file.
Ex: /opt/gluu/jetty/oxauth/custom/pages/login.xhtml for oxauth!