           tags: [Tag.t()],
           url: binary(),
           html: binary(),
+          preview: binary(),
           output: binary()
         }
 

  * `tags`: A list of tags
  * `url`: Absolute URL of the blog post in the website
  * `html`: Post contents converted into HTML
  * `output`: Destination path
  """


    datetime = header[:date]
    date_str = Timex.format!(datetime, proj.date_format)
    raw_date = datetime |> Timex.to_erl()
    preview = generate_preview(html, proj.preview_length)

    filename =
      path
