OFBiz or Bonsai ERP, and nginx
OFBiz can quite happily service all http and https requests on its own, and many people run it this way.
However there are many possible reasons why you might want to put OFBiz behind a traditional http server, such as Apache. Perhaps you want to more efficiently serve static resources, or manage virtual domains, or restrict access in complicated ways, or also serve php or cgi pages.
Typically OFBiz is placed behind Apache using a connector such as mod_proxy_ajp, as documented at How To Httpd .