Fix nil healthcheck error

main.go

@@ -7,7 +7,6 @@ import (
 	"log"
 	"os"
 	"strings"
-	"time"
 
 	"github.com/docker/cli/opts"
 	"github.com/docker/docker/api/types"
@@ -72,11 +71,6 @@ func parseFromJSON(cli *client.Client, ct *types.ContainerJSON) ([]string, error
 		opt[string]{ct.HostConfig.ContainerIDFile, "", "--cidfile "},
 
 		optFunc[*container.HealthConfig]{ct.Config.Healthcheck, handleHealthcheck},
-		opt[time.Duration]{ct.Config.Healthcheck.Interval, 0, "--health-interval="},
-		opt[int]{ct.Config.Healthcheck.Retries, 0, "--health-retries="},
-		opt[time.Duration]{ct.Config.Healthcheck.Timeout, 0, "--health-timeout="},
-		opt[time.Duration]{ct.Config.Healthcheck.StartInterval, 0, "--health-start-interval="},
-		opt[time.Duration]{ct.Config.Healthcheck.StartPeriod, 0, "--health-start-period="},
 
 		// Less common options that can go at the end
 

parse.go

@@ -5,6 +5,7 @@ import (
 	"slices"
 	"strconv"
 	"strings"
+	"time"
 
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/container"
@@ -184,13 +185,32 @@ func handleLabels(l *labels) (ret []string) {
 }
 
 func handleHealthcheck(health *container.HealthConfig) (ret []string) {
+	if health == nil {
+		return
+	}
+
 	if len(health.Test) > 0 {
 		if health.Test[0] == "NONE" {
 			ret = append(ret, "--no-healthcheck")
 			return
 		}
 		ret = append(ret, "--health-cmd="+strconv.Quote(strings.Join(health.Test[1:], " "))) // TODO: This is probably not right
 	}
+
+	var opts = map[string]time.Duration{
+		"--health-interval=":       health.Interval,
+		"--health-retries=":        time.Duration(health.Retries),
+		"--health-timeout=":        health.Timeout,
+		"--health-start-interval=": health.StartInterval,
+		"--health-start-period=":   health.StartPeriod,
+	}
+
+	for name, val := range opts {
+		if val != 0 {
+			ret = append(ret, name+val.String())
+		}
+	}
+
 	return
 }
 
@@ -201,6 +221,9 @@ func handlePorts(ctdata *types.ContainerJSON) (ret []string) {
 	}
 
 	ports := ctdata.HostConfig.PortBindings
+	if ports == nil {
+		return
+	}
 
 	for ctport, bindings := range ports {
 		protocol := ""