Add script to run JS specs in CI

script/ci/run_js_tests.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+set -e
+
+echo "--- Loading environment"
+source ./script/ci/includes.sh
+load_environment
+
+echo "--- Verifying branch is based on current master"
+exit_unless_master_merged
+
+echo "--- Bundling"
+bundle install
+
+echo "--- Running tests"
+bundle exec rake karma:run