Add info about importing RouterLink and RouterOutlet.
The existing document results in an error. The error indicates that the anchor element doesn't have the binding property for routerLink.
The corresponding module (RouterModule) should be imported in the component template.
Add description for RouterModule in housing-location component
The description is added to fix the issue with the anchor element tag binding.
PR Close#50348
Updated the content for the tutorial lesson 10, added doc regions to the code and updated the service. Also added a placeholder for lesson 11.
PR Close#49980
