#21 doc

.rultor.yml

@@ -1,12 +1,10 @@
+docker:
+  image: yegor256/rultor-image:1.20.0
 assets:
   rubygems.yml: yegor256/home#assets/rubygems.yml
-  s3cfg: yegor256/home#assets/s3cfg
 install: |
-  export GEM_HOME=~/.ruby
-  export GEM_PATH=$GEM_HOME:$GEM_PATH
-  sudo gem install pdd -v 0.20.5
-  bundle install
   pdd -f /dev/null
+  sudo bundle install --no-color "--gemfile=$(pwd)/Gemfile"
 release:
   script: |-
     bundle exec rake
@@ -20,7 +18,3 @@ release:
 merge:
   script: |-
     bundle exec rake
-deploy:
-  script: |-
-    echo "There is nothing to deploy"
-    exit -1

Gemfile

@@ -1,2 +1,4 @@
 source 'https://rubygems.org'
 gemspec
+
+gem 'rake', '13.0.6', require: false

jekyll-plantuml.gemspec

@@ -16,12 +16,11 @@ Gem::Specification.new do |s|
   s.description = "PlantUML diagrams in Jekyll pages"
   s.authors = ["Yegor Bugayenko"]
   s.email = 'yegor@tpc2.com'
-  s.homepage = 'http://github.com/yegor256/jekyll-plantuml'
+  s.homepage = 'https://github.com/yegor256/jekyll-plantuml'
   s.files = `git ls-files`.split($/)
   s.executables = s.files.grep(%r{^bin/}) { |f| File.basename(f) }
   s.test_files = s.files.grep(%r{^(test|spec|features)/})
   s.rdoc_options = ["--charset=UTF-8"]
   s.extra_rdoc_files = %w[README.md LICENSE.txt]
   s.add_runtime_dependency 'jekyll', '>2.0'
-  s.add_development_dependency 'rake', '12.0.0'
 end