Add the GitHub link

[GeneLiuXe]

What does this PR do?

Add the GitHub link in the docs and website.

Pre-Submission Checklist

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Have you followed the commit format and configured the hooks as outlined in the development standards?
• Was this discussed/approved via a Github issue? Please provide a link
  to the issue.
• If you modified the backend project, have you passed the relevant tests in backend/tests?
• If adding a new feature, have you added tests that cover your changes?