install curl

.gitlab-ci.yml

@@ -39,6 +39,7 @@ pods:
     name: ubuntu:18.04
     entrypoint: [""]
   script:
+    - apt update && apt install -y curl
     - curl -LO https://storage.googleapis.com/kubernetes-release/release/`curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt`/bin/linux/amd64/kubectl
     - chmod +x ./kubectl
     - ./kubectl version --client