✅ smoke check error

.circleci/config.yml

@@ -69,10 +69,10 @@ jobs:
           command: HTTPCODE=`curl -s -o /dev/null -w "%{http_code}" https://$HEROKU_APP_NAME.herokuapp.com/api/articles`
       - run:
           name: Smoke check
-          command:  if [ "$HTTPCODE" -ne 200 ];then
+          command:  if [[ "$HTTPCODE" -ne 200 ]];then
                       echo "heroku app not responding, failing to deploy"
                       exit 1
-                    fi;
+                    fi
   docker-build-push:
     working_directory: /dockerapp
     docker: