Add saving JS pages to static site build script

#15639

In d8b3c9f and 4bb70ee we added a way to generate some of our static
pages after JavaScript had finished running. This commit adds this step
into the static site generation build script.

After `wget` has finished running this script overwrites some of the
static files it generated with the (currently) few pages we want
enhanced with JS.

scripts/release.sh

@@ -13,8 +13,11 @@ set -eo pipefail
 build_viewer_static() {
   bundle exec ruby app.rb &
   while ! nc -z localhost 4567; do sleep 1; done
+  SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
   cd /tmp
   wget -nv -m localhost:4567/status/all_countries.html || (echo "wget exited with non-zero exit code: $?" >&2 && exit 1)
+  cd localhost:4567
+  BUNDLE_GEMFILE=$SCRIPT_DIR/../Gemfile bundle exec $SCRIPT_DIR/save_javascript_pages.rb http://localhost:4567/javascript_pages_to_scrape.txt
 }
 
 deploy_viewer_static() {