Update .gitlab-ci.yml

fixes #51 (closed)

.gitlab-ci.yml

@@ -55,6 +55,7 @@ build_docker:
         - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
         - docker build -t $CI_REGISTRY_IMAGE:$LAST_RELEASE .
         - docker push $CI_REGISTRY_IMAGE:$LAST_RELEASE
+        - docker tag $CI_REGISTRY_IMAGE:$LAST_RELEASE $CI_REGISTRY_IMAGE:latest
         - docker push $CI_REGISTRY_IMAGE:latest
         # Save docker image into a tar file to be uploaded in next stage
         - docker save -o Docker_${CI_PROJECT_NAME}_$LAST_RELEASE.tar $CI_REGISTRY_IMAGE:$LAST_RELEASE