Make docker URI part of config

restic_volume_backup/utils.py

@@ -1,8 +1,12 @@
 import docker
+import pprint
+
+from restic_volume_backup.config import Config
 
 
 def list_containers():
-    client = docker.Client(base_url=DOCKER_BASE_URL)
+    client = docker.Client(base_url=Config.docker_base_url)
     all_containers = client.containers()
+    pprint.pprint(all_containers, indent=2)
     client.close()
     return all_containers