Location of gitea HTML page source and other site assets

I’ve tried for hours and can’t figure out how to do this on 1.11.4

this is my folder structure and it’s off the main directory with data, logs, etc directories:

custom
└── templates
    └── base
        └── head_navbar.tmpl

I got the head_navbar.tmpl file directly from github using the tags for that release

i’m trying to remove the gitea icon and ‘help’ navbar items.

Is there a app.ini setting I need to change/add?