Update Gemfile

Gemfile

@@ -1,22 +1,44 @@
 source "https://rubygems.org"
 
-gem "jekyll", "~> 4.1"
+# Hello! This is where you manage which Jekyll version is used to run.
+# When you want to use a different version, change it below, save the
+# file and run `bundle install`. Run Jekyll with `bundle exec`, like so:
+#
+#     bundle exec jekyll serve
+#
+# This will help ensure the proper Jekyll version is running.
+# Happy Jekylling!
+gem "jekyll"
 
-gem "jekyll-theme-open-project", "~> 2.1.10"
+# This is the default theme for new Jekyll sites. You may change this to anything you like.
+
+# 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 "jekyll-theme-open-project"
+# gem "jekyll-theme-open-project", path: "~/src/jekyll-theme-open-project"
 
 # If you have any plugins, put them here!
 group :jekyll_plugins do
   gem "jekyll-seo-tag"
   gem "jekyll-sitemap"
   gem "jekyll-data"
   gem "jekyll-asciidoc"
+  gem "jekyll-redirect-from"
   gem "git"
-  gem "jekyll-theme-open-project-helpers", "~> 2.1.8"
+  gem "jekyll-theme-open-project-helpers"
+  gem "kramdown-parser-gfm"
+  gem "kramdown-syntax-coderay"
 end
 
+# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
 gem "tzinfo-data", platforms: [:mingw, :mswin, :x64_mingw, :jruby]
 
+# Performance-booster for watching directories on Windows
 gem "wdm", "~> 0.1.0" if Gem.win_platform?
 
+# For testing generated HTML pages and links
 gem "rake"
 gem "html-proofer"
+
+gem "webrick", "~> 1.7"