dont show progress bars in docker by default

docker-compose.yml

@@ -20,6 +20,7 @@ services:
             - 8000:8000
         environment:
             - USE_COLOR=True
+            - SHOW_PROGRESS=False
             # - SEARCH_BACKEND_ENGINE=sonic
             # - SEARCH_BACKEND_HOST_NAME=sonic
             # - SEARCH_BACKEND_PASSWORD=SecretPassword