Add Seitan article, implement <figure> capability

eleventy.config.js

@@ -2,6 +2,7 @@ const { DateTime } = require("luxon");
 const markdownIt = require("markdown-it");
 const markdownItFootnote = require("markdown-it-footnote");
 const markdownItAnchor = require("markdown-it-anchor");
+const mdfigcaption = require('markdown-it-image-figures');
 
 const pluginRss = require("@11ty/eleventy-plugin-rss");
 const pluginSyntaxHighlight = require("@11ty/eleventy-plugin-syntaxhighlight");
@@ -12,6 +13,10 @@ const { EleventyHtmlBasePlugin } = require("@11ty/eleventy");
 const pluginDrafts = require("./eleventy.config.drafts.js");
 const pluginImages = require("./eleventy.config.images.js");
 
+const figoptions = {
+	figcaption: true
+};
+
 module.exports = function(eleventyConfig) {
 	// Copy the contents of the `public` folder to the output folder
 	// For example, `./public/css/` ends up in `_site/css/`
@@ -91,7 +96,7 @@ module.exports = function(eleventyConfig) {
 			}),
 			level: [1,2,3,4],
 			slugify: eleventyConfig.getFilter("slugify")
-		}).use(markdownItFootnote);
+		}).use(markdownItFootnote).use(mdfigcaption, figoptions);
 	});
 
 	// Features to make your build faster (when you need them)