fix: make LogConfig type unexported

Signed-off-by: Ruihua Wen <[email protected]>

Author: SpiffyEight77

pkg/cmd/container/logs.go

@@ -108,7 +108,7 @@ func Logs(ctx context.Context, client *containerd.Client, container string, opti
 			detailPrefix := ""
 			if options.Details {
 				if logConfigJSON, ok := l["nerdctl/log-config"]; ok {
-					type LogConfig struct {
+					type logConfig struct {
 						Opts map[string]string `json:"opts"`
 					}
 
@@ -117,11 +117,11 @@ func Logs(ctx context.Context, client *containerd.Client, container string, opti
 						return err
 					}
 
-					var logConfig LogConfig
+					var logCfg logConfig
 					var optPairs []string
 
-					if err := json.Unmarshal([]byte(logConfigJSON), &logConfig); err == nil {
-						envOpts, labelOpts := getLogOpts(logConfig.Opts)
+					if err := json.Unmarshal([]byte(logConfigJSON), &logCfg); err == nil {
+						envOpts, labelOpts := getLogOpts(logCfg.Opts)
 
 						for _, v := range envOpts {
 							if env, ok := e[v]; ok {