Merge pull request #368 from codacy/clean/circle-prs

clean: Don't push 'stable' docker image for pull requests

Author: mrfyda

.circleci/config.yml

@@ -229,6 +229,10 @@ workflows:
           type: approval
           requires:
             - publish_docker_locally
+          filters:
+            branches:
+              only:
+                - master
       - codacy/shell:
           name: publish_dockerhub_stable
           context: CodacyDocker