Angular 2 routing only works in ng serve but not http server

[vishal1997]

For production I need to use http server instead of ng serve. But the routing is not working with http server, the same was working with ng serve.
Tried to solve this problem by implementing HashLocationStrategy which adds # to the routes by adding HashLocationStrategy to AppModule providers.

       providers: [{provide: LocationStrategy, useClass: HashLocationStrategy}],

and added the corresponding import
import { HashLocationStrategy, LocationStrategy } from '@angular/common';

But this didn't solved the problem only the root URL works, cannot navigate into other links.