I do this by creating Primary/html/index.html like this:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title>This is the Title</title>
<meta http-equiv="REFRESH"
content="0;url=https://www.website.com/home.html"></HEAD>
<BODY>
Website.com Redirect
</BODY>
</HTML>
[/size]
Then use "home.html" (or some other file, or another ibay entirely) to contain the actual homepage.
By the way - the only part of this that matters is the <meta http-euiv...> stuff. content="0;url=blahblahblah"> causes a redirect to the indicated URL after zero seconds. If you replace the zero with a 5 then you get a page that redirects after 5 seconds - presumably so folks have time to read your message saying you've moved your site...
You can also do this with template fragments that reconfigure Apache to redirect http:/www.website.com to
https://www.website.com, but I don't know how to do this!