GH Pages: minor tweaks to the configuration file

Includes adding a `commonmark` configuration to prevent Commonmark blindly stripping _all_ HTML.

Author: jrfnl

docs/_config.yml

@@ -33,4 +33,34 @@ twitter:
 author:
   twitter: jrf_nl
 
-exclude: ['CNAME', '.gitignore', 'Gemfile', '*.bak', '*.orig', 'vendor']
+# Needed so the select HTML tags do not get removed *sigh*
+commonmark:
+  options: ["SMART", "FOOTNOTES", "UNSAFE"]
+  extensions: ["strikethrough", "autolink", "table"]
+
+# Files to exclude when generating the site.
+exclude:
+  - .sass-cache/
+  - .jekyll-cache/
+  - gemfiles/
+  - Gemfile
+  - Gemfile.lock
+  - node_modules/
+  - vendor/bundle/
+  - vendor/cache/
+  - vendor/gems/
+  - vendor/ruby/
+  - CNAME
+  - CONTRIBUTING.md
+  - LICENSE
+  - README.md
+  - apigen.neon
+  - buildtool.py
+  - Vagrantfile
+  - vagrant-provision.sh
+  - .gitignore
+  - .github
+  - .jekyll-metadata
+  - '*.bak'
+  - '*.orig'
+  - runit.bat