fix sg deploy (#751)

Co-authored-by: siyu <chensiyi@agora.io>

Author: 2 people

.gitlab-ci.yml

@@ -129,5 +129,5 @@ deploy_prod_sg:
   <<: *DEPLOY
   extends: .sg
   variables:
-    DOCKER_TAG: $CI_COMMIT_SHA
+    DOCKER_TAG: dev-$CI_COMMIT_SHA
   <<: *DEV