set engines requirements to v8.15.0 so that pupeteer can run on Codeship

[slaruee]

# https://github.com/puppeteer/puppeteer/blob/master/docs/troubleshooting.md#running-puppeteer-in-docker
RUN wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add - \
  && sh -c 'echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list' \
  && apt-get update \
  && apt-get install -y google-chrome-unstable fonts-ipafont-gothic fonts-wqy-zenhei fonts-thai-tlwg fonts-kacst fonts-freefont-ttf \
  --no-install-recommends \
  && rm -rf /var/lib/apt/lists/*

# https://github.com/puppeteer/puppeteer/blob/master/docs/troubleshooting.md#running-puppeteer-in-docker
ENV PUPPETEER_SKIP_CHROMIUM_DOWNLOAD true

  // https://github.com/puppeteer/puppeteer/issues/3443
  const browser = await puppeteer.launch(
    process.env.CI_NAME === 'codeship'
      ? {
          args: ['--no-sandbox'],
          executablePath:
            'google-chrome-unstable' /*  https://github.com/puppeteer/puppeteer/blob/master/docs/troubleshooting.md#running-puppeteer-in-docker */,
        }
      : undefined
  );