The daemon.json storage-opts settings is actually a list.
@@ -888,7 +888,7 @@ This is a full example of the allowed configuration options in the file:
"exec-opts": [],
"exec-root": "",
"storage-driver": "",
- "storage-opts": "",
+ "storage-opts": [],
"labels": [],
"log-driver": "",
"log-opts": [],
