code: function renderPage(page, drizzleData) {
    page.contents = applyTemplate(
      wrapWithLayout(page, drizzleData),
      resourceContext(page, drizzleData),
      drizzleData.options
    );
    return page.contents;
  }
docs: Render an individual page: replace its `contents` property
  with compiled contents. Mutates the passed page object.
  
  @param {Object} page        Data for this page
  @param {Object} drizzleData All parsed data
  @return {String} compiled/rendered page contents.