Update .gitlab-ci.yml

.gitlab-ci.yml

-variables:
-  MAVEN_OPTS: -Dmaven.repo.local=.m2/repository
+default:
+  image: ruby:2.6
 
-image: maven:latest
+  services:
+    - postgres:11.7
 
-stages:
-    - build
-    - test
-    - package
-    - deploy
+  before_script:
+    - bundle install
 
-
-cache:
-  paths:
-    - .m2/repository
-    - target
-
-build_job:
-  stage: build
-  tags:
-    - docker 
-
-  script: 
-    - echo "Maven compile started"
-    - "mvn compile"
-
-
-test_job:
-  stage: test
-  tags:
-    - docker 
-
-  script: 
-    - echo "Maven test started"
-    - "mvn test"
-
-package_job:
-  stage: package
-  tags:
-    - docker 
-
-  script: 
-    - echo "Maven packaging started"
-    - "mvn package"
-
-
-Deploy_job:
-  stage: deploy
-  tags:
-    - docker 
-
-  script: 
-    - echo "Maven deploy started"
+test:
+  script:
+    - bundle exec rake spec
\ No newline at end of file