Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -4,5 +4,22 @@ variables:
   MAVEN_CLI_OPTS: "-s .m2/settings.xml --batch-mode"
   MAVEN_OPTS: "-Dmaven.repo.local=.m2/repository"
 
+cache:
+  paths:
+    - .m2/repository/
+    - target/
+
 build:
-  script: "mvn install"
+  stage: build
+  script:
+    - mvn install
+
+test:
+  stage: test
+  script:
+    - mvn test
+
+verify:
+  stage: test
+  script:
+    - mvn verify