[cherry-pick] Limit URL to local site

[stonezdj]

Thank you for contributing to Harbor!

Comprehensive Summary of your change

Issue being fixed

Fixes #(issue)

Please indicate you've done the following:

• Well Written Title and Summary of the PR
• Label the PR as needed. "release-note/ignore-for-release, release-note/new-feature, release-note/update, release-note/enhancement, release-note/community, release-note/breaking-change, release-note/docs, release-note/infra, release-note/deprecation"
• Accepted the DCO. Commits without the DCO will delay acceptance.
• Made sure tests are passing and test coverage is added if needed.
• Considered the docs impact and opened a new docs issue or PR with docs changes if needed in website repository.

[codecov]

Codecov Report

Attention: Patch coverage is 22.22222% with 7 lines in your changes are missing coverage. Please review.

Project coverage is 67.43%. Comparing base (3356196) to head (ebfc4e8).

Additional details and impacted files

@@                Coverage Diff                @@
##           release-2.9.0   #20023      +/-   ##
=================================================
+ Coverage          67.41%   67.43%   +0.01%     
=================================================
  Files                993      993              
  Lines             108982   108990       +8     
  Branches            2752     2752              
=================================================
+ Hits               73470    73493      +23     
+ Misses             31553    31537      -16     
- Partials            3959     3960       +1     

Flag	Coverage Δ
unittests	67.43% <22.22%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
src/common/utils/utils.go	78.13% <100.00%> (+0.20%)	⬆️
src/core/controllers/oidc.go	0.00% <0.00%> (ø)

... and 5 files with indirect coverage changes

[chlins]

lgtm