Sure, but that’s the problem. It’s not super hard (not trivial, I don’t expect startups to do it, but if you have 100 employees?), but no one bothers to do it anymore, so it’s not something anyone needs to learn/teach. Even worse version is DNS - many web engineers feel like DNS is scary, despite it being easier to handle in nearly every way than HTTP (easier to make redundant, easier interoperability between servers, easier to configure, etc).