Start Bootstrap 4.0 Update

404.html

@@ -0,0 +1,11 @@
+---
+layout: default
+---
+<hr class="custom m-0">
+<div class="container text-center my-5">
+  <h1 class="display-1">404</h1>
+
+  <p class="mb-1"><strong>Page not found :(</strong></p>
+  <p class="mb-5">The requested page could not be found.</p>
+  <a href="/" class="btn btn-primary btn-xl">Return Home</a>
+</div>

Gemfile

@@ -1,14 +1,21 @@
-source 'https://rubygems.org'
-gem "jekyll", "3.5.1"
+source "https://rubygems.org"
+gem "jekyll", "~> 3.8.4"
 
+# 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
+
+# If you have any plugins, put them here!
 group :jekyll_plugins do
+  gem "jekyll-feed", "~> 0.6"
+  gem 'jekyll-paginate'
   gem 'jekyll-redirect-from'
   gem 'jekyll-sitemap'
-  gem 'jekyll-paginate'
-  gem 'rouge'
+  gem 'jekyll-tidy'
 end
 
-require 'rbconfig'
-if RbConfig::CONFIG['target_os'] =~ /darwin(1[0-3])/i
-  gem 'rb-fsevent', '<= 0.9.4'
-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?

Gemfile.lock

@@ -4,43 +4,63 @@ GEM
     addressable (2.5.2)
       public_suffix (>= 2.0.2, < 4.0)
     colorator (1.1.0)
-    ffi (1.9.18)
+    concurrent-ruby (1.0.5)
+    em-websocket (0.5.1)
+      eventmachine (>= 0.12.9)
+      http_parser.rb (~> 0.6.0)
+    eventmachine (1.2.7)
+    ffi (1.9.25)
     forwardable-extended (2.6.0)
-    jekyll (3.5.1)
+    htmlbeautifier (1.3.1)
+    htmlcompressor (0.4.0)
+    http_parser.rb (0.6.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
+    jekyll (3.8.4)
       addressable (~> 2.4)
       colorator (~> 1.0)
+      em-websocket (~> 0.5)
+      i18n (~> 0.7)
       jekyll-sass-converter (~> 1.0)
-      jekyll-watch (~> 1.1)
-      kramdown (~> 1.3)
+      jekyll-watch (~> 2.0)
+      kramdown (~> 1.14)
       liquid (~> 4.0)
       mercenary (~> 0.3.3)
       pathutil (~> 0.9)
-      rouge (~> 1.7)
+      rouge (>= 1.7, < 4)
       safe_yaml (~> 1.0)
+    jekyll-feed (0.11.0)
+      jekyll (~> 3.3)
     jekyll-paginate (1.1.0)
-    jekyll-redirect-from (0.12.1)
+    jekyll-redirect-from (0.14.0)
       jekyll (~> 3.3)
-    jekyll-sass-converter (1.5.0)
+    jekyll-sass-converter (1.5.2)
       sass (~> 3.4)
-    jekyll-sitemap (1.1.1)
+    jekyll-sitemap (1.2.0)
       jekyll (~> 3.3)
-    jekyll-watch (1.5.0)
-      listen (~> 3.0, < 3.1)
-    kramdown (1.15.0)
-    liquid (4.0.0)
-    listen (3.0.8)
+    jekyll-tidy (0.2.2)
+      htmlbeautifier
+      htmlcompressor
+      jekyll
+    jekyll-watch (2.1.2)
+      listen (~> 3.0)
+    kramdown (1.17.0)
+    liquid (4.0.1)
+    listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
+      ruby_dep (~> 1.2)
     mercenary (0.3.6)
-    pathutil (0.16.0)
+    pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (3.0.0)
-    rb-fsevent (0.9.4)
+    public_suffix (3.0.3)
+    rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
-    rouge (1.11.1)
+    rouge (3.3.0)
+    ruby_dep (1.5.0)
     safe_yaml (1.0.4)
-    sass (3.5.2)
+    sass (3.6.0)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
@@ -50,11 +70,13 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  jekyll (= 3.5.1)
+  jekyll (~> 3.8.4)
+  jekyll-feed (~> 0.6)
   jekyll-paginate
   jekyll-redirect-from
   jekyll-sitemap
-  rouge
+  jekyll-tidy
+  tzinfo-data
 
 BUNDLED WITH
-   1.16.2
+   2.0.1