config: enable file logging by default

pkg/gomuks/config.go

@@ -44,25 +44,37 @@ type WebConfig struct {
 	DebugEndpoints bool   `yaml:"debug_endpoints"`
 }
 
-var defaultConfig = Config{
+var defaultFileWriter = zeroconfig.WriterConfig{
+	Type:   zeroconfig.WriterTypeFile,
+	Format: "json",
+	FileConfig: zeroconfig.FileConfig{
+		Filename:   "",
+		MaxSize:    100 * 1024 * 1024,
+		MaxBackups: 10,
+	},
+}
+
+func makeDefaultConfig() Config {
+	return Config{
 		Web: WebConfig{
 			ListenAddress: "localhost:29325",
 		},
 		Logging: zeroconfig.Config{
-		MinLevel: ptr.Ptr(zerolog.TraceLevel),
+			MinLevel: ptr.Ptr(zerolog.DebugLevel),
 			Writers: []zeroconfig.WriterConfig{{
 				Type:   zeroconfig.WriterTypeStdout,
 				Format: zeroconfig.LogFormatPrettyColored,
-		}},
+			}, defaultFileWriter},
 		},
 	}
+}
 
 func (gmx *Gomuks) LoadConfig() error {
 	file, err := os.Open(filepath.Join(gmx.ConfigDir, "config.yaml"))
 	if err != nil && !errors.Is(err, os.ErrNotExist) {
 		return err
 	}
-	gmx.Config = defaultConfig
+	gmx.Config = makeDefaultConfig()
 	changed := false
 	if file != nil {
 		err = yaml.NewDecoder(file).Decode(&gmx.Config)

pkg/gomuks/gomuks.go

@@ -146,6 +146,7 @@ func (gmx *Gomuks) InitDirectories() {
 	exerrors.PanicIfNotNil(os.MkdirAll(gmx.TempDir, 0700))
 	exerrors.PanicIfNotNil(os.MkdirAll(gmx.DataDir, 0700))
 	exerrors.PanicIfNotNil(os.MkdirAll(gmx.LogDir, 0700))
+	defaultFileWriter.FileConfig.Filename = filepath.Join(gmx.LogDir, "gomuks.log")
 }
 
 func (gmx *Gomuks) SetupLog() {