Another CI trick

.gitlab-ci.yml

@@ -5,6 +5,8 @@ stages:
 test_api:
   stage: test
   before_script:
+    - apk update
+    - apk add curl
     - curl -L https://github.com/docker/compose/releases/download/1.14.0/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
     - docker-compose -f api/test.yml build
   script: