message: Skip geckodriver download for product builds
diff: @@ -22,8 +22,9 @@ RUN tar fx yarn-offline.tar
  # bootstrap yarn so we can install and run the other tools.
  RUN container-entrypoint npm install ./yarn-1.9.4.tgz
  -# prevent download of chromedriver, sass binary, and node headers as part of module installs
  +# prevent download of chromedriver, geckodriver, sass binary, and node headers as part of module installs
  ENV CHROMEDRIVER_SKIP_DOWNLOAD=true \
  + GECKODRIVER_SKIP_DOWNLOAD=true \
  SKIP_SASS_BINARY_DOWNLOAD_FOR_CI=true \
  NPM_CONFIG_TARBALL=$HOME/node-v8.9.4-headers.tar.gz
  