Merge pull request dockersamples#87 from ikisusi/startup-order

fix start-up order, depend worker on redis in docker-compose.yml

Author: Mano Marks

docker-compose.yml

@@ -27,6 +27,8 @@ services:
   worker:
     build:
       context: ./worker
+    depends_on:
+      - "redis"
     networks:
       - back-tier