Use git Tag has docker tag

.gitlab-ci.yml

@@ -20,9 +20,8 @@ build_release:
     - build
   only:
     - tags
-  variables:
-    TAG: 3-management
   script:
+    - export TAG=$(echo $CI_COMMIT_TAG | sed 's/v//g')
     - docker-compose build
     - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
     - docker-compose push