fix docker-compose.yml (#44)

Author: JL710

examples/docker-compose-base/docker-compose.yml

@@ -26,6 +26,7 @@ services:
     ports: []
     container_name: grampsweb_celery
     depends_on:
+      - grampsweb
       - grampsweb_redis
     command: celery -A gramps_webapi.celery worker --loglevel=INFO --concurrency=2