Routing in AngularJs and #!?

Question

Angular

I am writing an application in AngularJs. I made routing in the application, I made it so that the characters #! were not displayed in the address bar. But: if I write localhost:9000/#!/catalog in the address bar, then the application follows the /catalog route. But if you write localhost:9000/catalog , then the route does not go through and the page displays: "Cannot GET: /catalog". Moreover, by such a link: or using a javascript code: - by these methods, the transition along the route occurs. The problem is in the transition through the address bar, that is, it is impossible to go to the address localhost:9000/catalog, you need to write: localhost:9000/#!/catalog Who knows how to fix it?
<a href="/catalog">
$location.path("/catalog");

Answer 1

on the server side, make a return on all urls of the same file, as for the main page