You can customise the Welcome Visitors page by creating a new "home" folder inside of the Fedwiki Assets Folder. We call this custome __Welcome Visitors__ page a Fedwiki Home/
The Fedwiki Root Folder structure for your wiki site looks like this:
example.com/ assets/ david.png home/ index.html pages/ ... lots of json files for the sites content status/ favicon.png persona.identity sitemap.json sitempa.xml theme/ style.css
# See also - Fedwiki Assets Folder - Fedwiki Theme Folder