How do they put a site with a backend on the Internet?

Question

Network administration

Good day!
The question is obviously stupid, but I'm still wondering how this happens.
On the Internet I find only lessons on how to lay out index.html with styles and scripts, but not a word about the backend.
How is the process going? Whether strongly differs from above mentioned in the presence of the server and ?

Answer 1

Usually they collect all dependencies locally, pack them into an archive, upload them to the server, deploy and execute scripts nearby.
Or containers.

Answer 2

index.html is served by the server.
For example, nginx The
layout of the site in this case consists of nginx + index.html
And a site with a dynamic backend, for example, in PHP, consists of
*.php files,
PHP itself
and, as a rule, nginx again stands in front of it