Need two PR to submit snippets to website

Looks like build_github_samples.sh uses code already on the repo to build local serving;

do
  fileName=$(echo "$url" | sed -e 's/\//_/g')
  curl -o "$DIST_DIR"/"$fileName" "https://raw.githubusercontent.com$url"
done

So when tying to test locally, the code needs to have already be in Beam. 

Ideally the script should make use of local code when building so :

1- Easier to  build & test changes.
2- No need to raise two PR for what is a single change