function generateTOCbyMonth(files, options) {
  gutil.log(' ', 'Generating _toc.yaml for', options.title);
  let context = {
    year: options.year,
    title: options.title,
    section: options.section,
    months: wfHelper.splitByMonth(files).reverse(),
  };
  const template = path.join(global.WF.src.templates, 'toc-month.yaml');
  const outputFile = path.join(options.outputPath, '_toc.yaml');
  renderTemplate(template, context, outputFile);
}
Generate a TOC page by month

@param {Array} files List of files to generate page for
@param {Object} options Options used to generate the page