still trying to build github pages

docs/Gemfile

@@ -7,17 +7,20 @@ source "https://rubygems.org"
 #
 # This will help ensure the proper Jekyll version is running.
 # Happy Jekylling!
-#gem "jekyll", "~> 4.2.2"
+#gem "jekyll", "~> 4.2.0"
 # This is the default theme for new Jekyll sites. You may change this to anything you like.
 #gem "minima", "~> 2.5"
 # If you want to use GitHub Pages, remove the "gem "jekyll"" above and
 # uncomment the line below. To upgrade, run `bundle update github-pages`.
 gem "github-pages", group: :jekyll_plugins
+#gem "github-pages", "~> 226", group: :jekyll_plugins
 # If you have any plugins, put them here!
 #group :jekyll_plugins do
-#  gem "jekyll-feed", "~> 0.12"
+  #gem "jekyll-feed", "~> 0.12"
 #end
 
+gem 'html-proofer'
+
 # Windows and JRuby does not include zoneinfo files, so bundle the tzinfo-data gem
 # and associated library.
 platforms :mingw, :x64_mingw, :mswin, :jruby do
@@ -26,10 +29,4 @@ platforms :mingw, :x64_mingw, :mswin, :jruby do
 end
 
 # Performance-booster for watching directories on Windows
-gem "wdm", "~> 0.1.1", :platforms => [:mingw, :x64_mingw, :mswin]
-
-# Lock `http_parser.rb` gem to `v0.6.x` on JRuby builds since newer versions of the gem
-# do not have a Java counterpart.
-gem "http_parser.rb", "~> 0.6.0", :platforms => [:jruby]
-
-gem "webrick", "~> 1.8"
+gem "wdm", "~> 0.1.1", :platforms => [:mingw, :x64_mingw, :mswin]