export BUILD_DATE=$(TZ=UTC date "+%Y-%m-%d")
export BUILD_TIME=$(TZ=UTC date "+%H:%M:%S %Z")

npm install
gem install bundler:2.2.5
bundle install

sed -i "s/^     date:.*$/     date: $BUILD_DATE/" _config.yml
sed -i "s/^     time:.*$/     time: $BUILD_TIME/" _config.yml

JEKYLL_ENV=production bundle exec jekyll build