add build-essential package to netlify and pin a few problematic gems.

Author: dcolebatch

Gemfile

@@ -6,3 +6,8 @@ group :jekyll_plugins do
   gem 'jekyll-redirect-from'
   gem 'jekyll-sitemap'
 end
+
+# Pinning problematic gems to compatible versions
+gem 'commonmarker', '~> 0.23.9'
+gem 'unf_ext', '~> 0.0.8.1'
+gem 'eventmachine', '~> 1.2.6'

Gemfile.lock

@@ -200,11 +200,6 @@ GEM
       gemoji (>= 3, < 5)
       html-pipeline (~> 2.2)
       jekyll (>= 3.0, < 5.0)
-    just-the-docs (0.10.1)
-      jekyll (>= 3.8.5)
-      jekyll-include-cache
-      jekyll-seo-tag (>= 2.0)
-      rake (>= 12.3.1)
     kramdown (2.4.0)
       rexml
     kramdown-parser-gfm (1.1.0)
@@ -230,7 +225,6 @@ GEM
       forwardable-extended (~> 2.6)
     public_suffix (4.0.7)
     racc (1.6.2)
-    rake (13.2.1)
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
@@ -265,10 +259,13 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  commonmarker (~> 0.23.9)
+  eventmachine (~> 1.2.6)
   github-pages (~> 232)
   jekyll-feed
   jekyll-redirect-from
   jekyll-sitemap
+  unf_ext (~> 0.0.8.1)
 
 BUNDLED WITH
    2.6.8

netlify.toml

@@ -4,7 +4,13 @@
 
 [build]
   command = "bundle install && bundle exec jekyll build"
-  publish = "_site"
+    publish = "_site"
+
+[build.processing]
+  skip_processing = true
+
+[build.lifecycle]
+  onBuild = "sudo apt-get update && sudo apt-get install -y build-essential"
 
 [[plugins]]
   package = "@netlify/plugin-ruby-bundler"