fix: only build docker images on tag

.gitlab-ci.yml

@@ -32,6 +32,5 @@ docker:
     - echo "{\"auths\":{\"$CI_REGISTRY\":{\"username\":\"$CI_REGISTRY_USER\",\"password\":\"$CI_REGISTRY_PASSWORD\"}}}" > /kaniko/.docker/config.json
     - /kaniko/executor --context $CI_PROJECT_DIR --dockerfile $CI_PROJECT_DIR/Dockerfile --destination $CI_REGISTRY_IMAGE:${CI_COMMIT_REF_NAME%+*}
   rules:
-    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
     - if: $CI_COMMIT_TAG && $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
   needs: ["test"]