fix: should disable color when logging to a file

go.mod

@@ -7,6 +7,7 @@ require (
 	github.com/go-resty/resty/v2 v2.12.0
 	github.com/joho/godotenv v1.5.1
 	github.com/lmittmann/tint v1.0.4
+	github.com/mattn/go-isatty v0.0.20
 	github.com/spf13/viper v1.18.2
 )
 
@@ -18,7 +19,6 @@ require (
 	github.com/hashicorp/go-retryablehttp v0.7.5 // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
 	github.com/magiconair/properties v1.8.7 // indirect
-	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/pelletier/go-toml/v2 v2.1.0 // indirect
 	github.com/sagikazarmark/locafero v0.4.0 // indirect

main.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	_ "github.com/joho/godotenv/autoload"
 	"github.com/lmittmann/tint"
+	"github.com/mattn/go-isatty"
 	"github.com/spf13/viper"
 	"github.com/we11adam/uddns/app"
 	"github.com/we11adam/uddns/notifier"
@@ -22,7 +23,8 @@ import (
 
 func init() {
 	slog.SetDefault(slog.New(
-		tint.NewHandler(os.Stderr, &tint.Options{
+		tint.NewHandler(os.Stdout, &tint.Options{
+			NoColor:    !isatty.IsTerminal(os.Stdout.Fd()),
 			Level:      slog.LevelDebug,
 			TimeFormat: time.DateTime,
 		}),