Fixed tag-based release in CI. [skip-ci]

.gitlab-ci.yml

@@ -143,19 +143,21 @@ release:
     - docker pull $TEST_IMAGE
     - docker tag $TEST_IMAGE $LATEST_IMAGE
     - docker push $LATEST_IMAGE
-
   except:
     - /^dev-.*$/
-  when: manual
+  when:
+      - manual
+  only:
+    - branches
 
 release_version:
   stage: release
   script:
     - docker login -u gitlab-ci-token -p $CI_BUILD_TOKEN gitlab-registry.mpcdf.mpg.de
-    - docker pull $LATEST_IMAGE
-    - docker tag $LATEST_IMAGE $CI_COMMIT_TAG
-    - docker tag $LATEST_IMAGE $STABLE_IMAGE
+    - docker pull $TEST_IMAGE
+    - docker tag $TEST_IMAGE $LATEST_IMAGE
+    - docker push $LATEST_IMAGE
+    - docker tag $TEST_IMAGE $STABLE_IMAGE
     - docker push $STABLE_IMAGE
-    - docker push $CI_COMMIT_TAG
   only:
     - tags