Added bootstrap and jekyll-assets to dependencies

Signed-off-by: Jim Martens <github@2martens.de>

Gemfile

@@ -4,6 +4,9 @@ gem 'activesupport'
 # gem 'github-pages-health-check'
 gem 'jekyll'
 group :jekyll_plugins do
+  gem 'autoprefixer-rails'
+  gem 'bootstrap', '~> 4.0.0.beta2'
+  gem 'jekyll-assets'
   gem 'jekyll-avatar'
   gem 'jekyll-coffeescript'
   gem 'jekyll-commonmark-ghpages'

Gemfile.lock

@@ -8,6 +8,12 @@ GEM
       tzinfo (~> 1.1)
     addressable (2.5.2)
       public_suffix (>= 2.0.2, < 4.0)
+    autoprefixer-rails (7.2.3)
+      execjs
+    bootstrap (4.0.0.beta2.1)
+      autoprefixer-rails (>= 6.0.3)
+      popper_js (>= 1.12.3, < 2)
+      sass (>= 3.5.2)
     coffee-script (2.4.1)
       coffee-script-source
       execjs
@@ -19,8 +25,11 @@ GEM
     ethon (0.11.0)
       ffi (>= 1.3.0)
     execjs (2.7.0)
+    extras (0.3.0)
+      forwardable-extended (~> 2.5)
     faraday (0.13.1)
       multipart-post (>= 1.2, < 3)
+    fastimage (2.1.1)
     ffi (1.9.18)
     forwardable-extended (2.6.0)
     gemoji (3.0.0)
@@ -40,6 +49,14 @@ GEM
       pathutil (~> 0.9)
       rouge (>= 1.7, < 3)
       safe_yaml (~> 1.0)
+    jekyll-assets (2.4.0)
+      concurrent-ruby (~> 1.0)
+      extras (~> 0.2)
+      fastimage (~> 2.0, >= 1.8)
+      jekyll (~> 3.1, >= 3.0)
+      pathutil (>= 0.8)
+      rack (~> 1.6)
+      sprockets (~> 3.3, < 3.8)
     jekyll-avatar (0.5.0)
       jekyll (~> 3.0)
     jekyll-coffeescript (1.0.2)
@@ -147,7 +164,9 @@ GEM
       sawyer (~> 0.8.0, >= 0.5.3)
     pathutil (0.16.1)
       forwardable-extended (~> 2.6)
+    popper_js (1.12.9)
     public_suffix (2.0.5)
+    rack (1.6.8)
     rb-fsevent (0.10.2)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
@@ -164,6 +183,9 @@ GEM
     sawyer (0.8.1)
       addressable (>= 2.3.5, < 2.6)
       faraday (~> 0.8, < 1.0)
+    sprockets (3.7.1)
+      concurrent-ruby (~> 1.0)
+      rack (> 1, < 3)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
     thread_safe (0.3.6)
@@ -178,7 +200,10 @@ PLATFORMS
 
 DEPENDENCIES
   activesupport
+  autoprefixer-rails
+  bootstrap (~> 4.0.0.beta2)
   jekyll
+  jekyll-assets
   jekyll-avatar
   jekyll-coffeescript
   jekyll-commonmark-ghpages
@@ -220,4 +245,4 @@ DEPENDENCIES
   terminal-table
 
 BUNDLED WITH
-   1.15.4
+   1.16.1