How could the website content sync with the opensource content of github?

I know the website
​https://www.kubernetes.dev is use the content of
content of GitHub - kubernetes/contributor-site: Code for kubernetes.dev _index.md

but I have several questions:

  1. how could the kubernetes.dev sync content with the content of github?
  2. I compare the content of them, the github has more content, such as the table:

How could when sync GitHub content to website deleted the redundant information?

There is a script that pulls in content from other locations at build time. The details are in the contributor-site’s readme

That is hugo front matter, it tells hugo (the static site generator we use) how the page should be displayed displayed. It’s never intended to be visible to people viewing the site.