Configure syntax highlighting

.eleventy.js

@@ -1,5 +1,6 @@
 const pluginRss = require('@11ty/eleventy-plugin-rss')
 const pluginToc = require('eleventy-plugin-nesting-toc')
+const pluginSyntaxHighlight = require('@11ty/eleventy-plugin-syntaxhighlight')
 
 // extra features for markdown
 const markdownIt = require('markdown-it')
@@ -13,13 +14,15 @@ const header = require('./src/_includes/filters/header')
 module.exports = function (config) {
   config.addPlugin(pluginRss)
   config.addPlugin(pluginToc)
+  config.addPlugin(pluginSyntaxHighlight)
 
-	config.setBrowserSyncConfig({
-		files: './_site/assets/*.css'
-	})
+  config.setBrowserSyncConfig({
+    files: './_site/assets/*.css'
+  })
 
   config.addPassthroughCopy('src/assets/key.txt')
   config.addPassthroughCopy('src/assets/ibm-plex/IBM-Plex-Mono/fonts/**/*')
+  config.addPassthroughCopy('src/assets/prism-base16-ateliersulphurpool.light.css')
   config.addPassthroughCopy('src/posts/**/*.{jpeg,jpg,png,webp}')
 
   // configure markdown