message: Fix test-frontend script to fail if linter fails.
diff: #!/bin/bash -e
  -pushd frontend
  -yarn run lint && yarn run lint:ts
  +set -euo pipefail
  +
  +cd frontend
  +yarn run lint
  yarn run test
  -popd
  if git status --short | grep 'yarn.lock' > /dev/null; then
  - echo "outdated yarn.lock (commit it to fix)"
  + printf "\n\nOUTDATED yarn.lock (COMMIT IT TO FIX!!!!!)\n"
  exit 1
  fi
  