[infra] add eleventy syntax highlighting

Author: addyosmani

site/.eleventy.js

@@ -1,7 +1,11 @@
 const markdownIt = require('markdown-it');
 const htmlminifier = require('html-minifier');
+const syntaxHighlight = require("@11ty/eleventy-plugin-syntaxhighlight");
 
 module.exports = function(eleventyConfig) {
+  eleventyConfig.addPlugin(syntaxHighlight, {
+    templateFormants: ["md", "js", "html"]
+  });
   eleventyConfig.addPassthroughCopy("src/assets");
   eleventyConfig.addPassthroughCopy("src/styles");
   eleventyConfig.addPassthroughCopy("src/script.js");

site/package.json

@@ -12,6 +12,7 @@
   },
   "license": "Apache-2.0",
   "dependencies": {
+    "@11ty/eleventy-plugin-syntaxhighlight": "^3.0.1",
     "html-minifier": "^4.0.0"
   }
-}
+}