Add wait for container to build_test job

.gitlab-ci.yml

@@ -347,6 +347,8 @@ build_test:
         SELECTED_CONFERENCE_ID: "017c0749-a2ea-4f86-92cd-e60b4508dd98"
   before_script:
     - pip3 install requests
+    # TODO: remove this sleep once we have debugged the case for the 0 ms failure
+    - sleep 30
     - echo "testing on $BASE_URL"
     - curl --max-time 8 --retry 3 --fail ${BASE_URL}/.well-known/version
     - curl --max-time 3 --retry 3 --fail ${BASE_URL}/.well-known/health