.rultor.yml in jgd-1.12 vs .rultor.yml in jgd-1.13.0

@@ -1,15 +1,15 @@
+docker:
+  image: yegor256/rultor-image:1.21.0
 readers:
   - "urn:github:526301"
 decrypt:
   rubygems.yml: repo/rubygems.yml.asc
 install: |-
   git config --global user.email "[e-mail]"
   git config --global user.name "Test"
-  export GEM_HOME=~/.ruby
-  export GEM_PATH=$GEM_HOME:$GEM_PATH
-  bundle install
+  sudo bundle install --no-color "--gemfile=$(pwd)/Gemfile"
 release:
   script: |-
     bundle exec rake
     ./test.sh
     rm -rf *.gem
@@ -19,9 +19,5 @@
     gem push *.gem --config-file ../rubygems.yml
 merge:
   script: |-
     bundle exec rake
     ./test.sh
-deploy:
-  script: |-
-    echo 'There is nothing to deploy'
-    exit -1