fix urbit mount path

docker/urbit.go

@@ -138,7 +138,7 @@ func urbitContainerConf(containerName string) (container.Config, container.HostC
 		{
 			Type:   mount.TypeBind,
 			Source: shipName,
-			Target: "/data",
+			Target: "/urbit",
 		},
 	}
 	hostConfig = container.HostConfig{