.rultor.yml in cobench-0.0.17 vs .rultor.yml in cobench-0.0.18

@@ -1,5 +1,7 @@
+docker:
+  image: yegor256/rultor-image:1.9.1
 assets:
   rubygems.yml: yegor256/home#assets/rubygems.yml
 install: |
   pdd -f /dev/null
   sudo bundle install --no-color "--gemfile=$(pwd)/Gemfile"
@@ -14,9 +16,5 @@
     chmod 0600 ../rubygems.yml
     gem push *.gem --config-file ../rubygems.yml
 merge:
   script: |-
     bundle exec rake
-deploy:
-  script: |-
-    echo "There is nothing to deploy"
-    exit -1