More docker stuff in gitlab-ci.yml

.gitlab-ci.yml

-# This file is generated by GitLab CI
+image: "ruby:2.1"
+
+services:
+  - mysql:latest
+  - postgres:latest
+  - redis:latest
+
+variables:
+  MYSQL_ALLOW_EMPTY_PASSWORD: "1"
+
 before_script:
   - ./scripts/prepare_build.sh
   - ruby -v
@@ -10,9 +19,6 @@ before_script:
   - bundle install --without postgres production --jobs $(nproc)  "${FLAGS[@]}"
   - RAILS_ENV=test bundle exec rake db:drop db:create db:schema:load db:migrate
 
-variables:
-  MYSQL_ALLOW_EMPTY_PASSWORD: "1"
-
 spec:feature:
   script:
     - RAILS_ENV=test bundle exec rake assets:precompile 2>/dev/null