Open Graph Metadata for Single Page Article with Extra Front Matter Variables

This post tests Open Graph metadata added to article created as a single page with extra front matter variables such as publishDate, lastmod, images, audio, and videos.

The generated page source should contain base Open Graph metadata tags such as og:site_name, og:title , og:description, og:type, og:url, article:section, article:published_time, article:modified_time , og:image, og:audio, and og:video.