Why does the project open on the server's localhost and not 3000?

Question

Express.js

Why suddenly, after restarting the project, it opens on localhost: 8090, although this is the server route, and not on 3000, before that everything worked fine. From port 3000, there was a transition to the route from the server to receive data

Answer 1

or maybe a copy of the project is already hanging there or something else ... see the configuration files