• Install Ruby
• Install Bundler
• Checkout repo
• Run bundle install in checked out repo

bundle exec jekyll serve

Alternatively, you can use the jekyll-docker container to build and serve the docs site locally:

docker run --rm \
  --volume="$PWD:/srv/jekyll" \
  --publish [::1]:4000:4000 \
  jekyll/jekyll \
  bash -c 'rm -rf ./_site && jekyll serve'

Once you have code changes, submit a PR to the docs site. Netlify will generate a preview of your changes and the team will review.