Description of problem:

When using the new bulk import feature (RHDH 1.3), the import PR has a default description linking to http://localhost:3000, which will not work when the application is deployed on a cluster and remotely accessible.

Prerequisites (if any, like setup, operators/versions):

• Some GitHub integrations are configured in the app-config. See https://backstage.io/docs/integrations/github/locations/#configuration
• Enable the bulk import plugins in the dynamic plugins config. Example with the Dynamic Plugins ConfigMap:
  1.  

     apiVersion: v1
     kind: ConfigMap
     metadata:
       name: dynamic-plugins-rhdh
     data:
       dynamic-plugins.yaml: |
         includes:
           - dynamic-plugins.default.yaml
         plugins:
           # Enable Bulk import plugins.
           - package: ./dynamic-plugins/dist/janus-idp-backstage-plugin-bulk-import-backend-dynamic
             disabled: false
           - package: ./dynamic-plugins/dist/janus-idp-backstage-plugin-bulk-import
             disabled: false

Steps to Reproduce

1. Deployed RHDH using the Operator, with the following CR:

apiVersion: rhdh.redhat.com/v1alpha1
kind: Backstage
metadata:
  name: my-rhdh
spec:
  application:
    image: quay.io/janus-idp/backstage-showcase:pr-1547
    appConfig:
      configMaps:
        - name: app-config-rhdh
    dynamicPluginsConfigMapName: dynamic-plugins-rhdh
    extraEnvs:
      secrets:
        - name: secrets-rhdh
        - name: gh-apps-creds

Actual results:

See the screencast attached to better understand the issue: Screencast from 2024-09-02 10-23-49.mp4

Expected results:

The link to the software catalog in the PR description should not be hardcoded. The host in the URL should be that of the deployed Backstage instance the user is using. So in this case, it should be: https://backstage-my-rhdh-my-ns.apps.ci-ln-1n5nbg2-76ef8.origin-ci-int-aws.dev.rhcloud.com/catalog 

Reproducibility (Always/Intermittent/Only Once):

Always (when the bulk import plugins are enabled). It looks like http://localhost:3000 is hardcoded in the bulk import frontend plugin, from what I can see here: https://github.com/janus-idp/backstage-plugins/blob/main/plugins/bulk-import/src/utils/repository-utils.tsx#L94 

Build Details:

RHDH Version: 1.3.0
Backstage Version: 1.29.2
Last Commit: janus-idp/backstage-showcase/pull/1547 @ 9aeca2c
Build Time: 2024-08-30T13:27:19Z

Additional info (Such as Logs, Screenshots, etc):