Add missing curl dependency

.gitlab-ci.yml

@@ -26,7 +26,7 @@ build-image:
   script:
     - source .env.update
     - if [ "$NEED_UPDATE" = false ]; then exit 0; fi
-    - apk add git wget
+    - apk add git wget curl
     - git clone https://gitlab.com/gitlab-org/omnibus-gitlab
     - cd omnibus-gitlab
     - "GITLAB_VER=$(git tag | sort -V | grep -v rc | grep ce | tail -1)"