Fix local preview

.gitignore

@@ -4,3 +4,7 @@ _site
 # Other Jekyll files
 .sass-cache
 .jekyll-metadata
+
+# Locking Ruby library version creates a ton of headaches for local preview
+# and GitHub pages deploy
+Gemfile.lock

Gemfile

@@ -1,3 +1,10 @@
+# Based on Primer Spec instructions
+# https://eecs485staff.github.io/primer-spec/docs/USAGE_ADVANCED.html#previewing-locally
+
 source 'https://rubygems.org'
-gem 'github-pages'
+
+gem 'github-pages', '228'
 gem 'webrick'
+
+# Needed for Ruby 3.4
+gem 'csv'

docs/_config.yml

@@ -1,5 +1,5 @@
 # This config file renders the "primer-spec" theme from:
-# https://github.com/eecs485staff/primer-spec
+# https://eecs485staff.github.io/primer-spec/docs/USAGE_ADVANCED.html#site-configuration-options
 # This theme is built on the default GitHub Markdown theme "Primer", and
 # optionally renders a sidebar to easily navigate project specs.
 
@@ -13,6 +13,7 @@ plugins:
   - jekyll-optional-front-matter
   - jekyll-readme-index
   - jekyll-relative-links
+  - jekyll-default-layout
   - jemoji
 kramdown:
   input: GFM