How to map a route in Pivotal Cloud Foundry to a landing page

I want PCF (Pivotal Cloud Foundry) route to a landing page. I have an application called app-service, it has a landing page which can be accessed by the link localhost:8080/app-service/info. How can I configure in Manifest.yml file for PCF so that simply clicking on route which is available in Pivotal Cloud Foundry AppsManager Dashboard to a landing page. Currently after making deployment in PCF, when I click the link (which is route) in dashboard page, it say Whitelabel Error Page. So the requirement is to redirect PCF route to a landing page in Spring Boot.

To map routes to your app:

1. Go to the app Overview page.
2. In the panel on the left side of the page, under Networking, click Routes.
3. To add a new route, click Map a Route.
4. Enter the route and click Map.
5. Under Choose Protocol, select either HTTP1 or HTTP2.

Based on: https://docs.vmware.com/en/VMware-Tanzu-Application-Service/3.0/tas-for-vms/manage-apps.html

If you want to map a route during deployment add following to the manifest.yml:

routes:
  - route: pcf-host.your-domain.com/app-service/info

Based on: https://docs.cloudfoundry.org/devguide/deploy-apps/manifest-attributes.html#routes