fix: handle nil Health state in docker container handler

Container.State.Health can be nil when no health check is configured.
Check for nil before accessing .Status to prevent panic.

Fixes nil pointer dereference in newDockerContainerHandler when
inspecting containers without health checks.

Signed-off-by: Davanum Srinivas <[email protected]>

Author: dims

container/docker/handler.go

@@ -199,10 +199,13 @@ func newDockerContainerHandler(
 		rootfsStorageDir:   rootfsStorageDir,
 		envs:               make(map[string]string),
 		labels:             ctnr.Config.Labels,
-		healthStatus:       ctnr.State.Health.Status,
 		includedMetrics:    metrics,
 		zfsParent:          zfsParent,
 	}
+	// Health status may be nil if no health check is configured
+	if ctnr.State.Health != nil {
+		handler.healthStatus = ctnr.State.Health.Status
+	}
 	// Timestamp returned by Docker is in time.RFC3339Nano format.
 	handler.creationTime, err = time.Parse(time.RFC3339Nano, ctnr.Created)
 	if err != nil {