Add conditions to trigger release via ci

.gitlab-ci.yml

@@ -28,4 +28,9 @@ release:
     - export TAG="${CI_COMMIT_TAG:-latest}" && echo $TAG
     - docker build -t ${IMAGE_NAME}:${TAG} .
     - docker push ${IMAGE_NAME}:${TAG}
+  rules:
+    - if: $CI_COMMIT_BRANCH == "master"
+      when: on_success
+    - if: $CI_COMMIT_TAG
+      when: on_success
 ...