Only tag latest on release branch

.gitlab-ci.yml

@@ -200,9 +200,7 @@ deploy_docker:
     - echo $DH_REGISTRY_PASSWORD | docker login -u $DH_REGISTRY_USER --password-stdin
   script:
     - docker tag $INTEGRATION_IMAGE astronrd/linc:$LINC_VERSION
-    - docker tag $INTEGRATION_IMAGE astronrd/linc:latest
     - docker push astronrd/linc:$LINC_VERSION
-    - docker push astronrd/linc:latest
   rules:
     # Only run on master
     - if: '$CI_COMMIT_BRANCH == "master"'
@@ -222,7 +220,9 @@ deploy_release:
   script:
     - echo -n "$CI_COMMIT_BRANCH" | sed -e "s/^releases\//export RELEASE=/" > version && source version
     - docker tag $INTEGRATION_IMAGE astronrd/linc:$RELEASE
+    - docker tag $INTEGRATION_IMAGE astronrd/linc:latest
     - docker push astronrd/linc:$RELEASE
+    - docker push astronrd/linc:latest
     # Update docker image in cwl steps by tagged version
     - sed -i "s/astronrd\/linc/astronrd\/linc:$RELEASE/g" steps/*.cwl
     # Create and push Git tag