Update .gitlab-ci.yml file

.gitlab-ci.yml

 image: maven:3.8.6-eclipse-temurin-17
 
-build:
+stages:
+    - test
+    - build
+
+code-coverage:
+    stage: test
     script:
         - cd CityDoctorParent
         - mvn verify -U
     coverage: /Total.*?([0-9]{1,3})%/
+    artifacts:
+        when: always
+        paths:
+            - CityDoctorParent/target/site/
+
+build:
+    stage: build
+    script:
+        - cd CityDoctorParent
+        - mvn verify -U
     artifacts:
         when: always
         reports:
             junit:
                 - CityDoctorParent/**/target/surefire-reports/TEST-*.xml
+
+