fix: get actual default domain from API

  }

  function default_domain() {

    # pick the 1st 'shared' domain that is not 'tcp' or 'internal'

    cf domains | awk '/ shared/ && !/ tcp/ && !/ internal/ {print $1}' | head -n 1 || true

    org_name=$(cf target | awk '/org:/ {print $2}')

    org_guid=$(cf curl "/v3/organizations?names=$org_name" | jq -crM '.resources[0].guid')

    cf curl "/v3/organizations/$org_guid/domains/default" | jq -crM '.name' || true

  }

  function unmap_app_routes() {