🛠 Add jekyll-assets for asset pipeline #100DaysOfCode R1D27

Used an old version because documentation of current version is incomplete.
I couldn't figure out how to get it to work properly.

_config.yml

@@ -55,23 +55,17 @@ collections:
   links:
     output: false
 
-#
-# !! You don't need to change any of the configuration flags below !!
-#
-
 permalink: /:year/:month/:title/
 
 # Jekyll 3 now only supports Kramdown for Markdown
 kramdown:
   # Use GitHub flavored markdown, including triple backtick fenced code blocks
   input: GFM
-  # Jekyll 3 and GitHub Pages now only support rouge for syntax highlighting
   syntax_highlighter: rouge
   syntax_highlighter_opts:
     # Use existing pygments syntax highlighting css
     css_class: 'highlight'
 
-# Set the Sass partials directory, as we're using @imports
 sass:
   style: :expanded # You might prefer to minify using :compressed
 
@@ -79,6 +73,7 @@ sass:
 plugins:
   - jekyll-sitemap # Create a sitemap using the official Jekyll sitemap gem
   - jekyll-seo-tag
+  - jekyll-assets
   - bootstrap
 
 # Exclude these files from your production _site