initial support for file logging

storage/pkg/command/root.go

@@ -107,5 +107,6 @@ func NewLogger(cfg *config.Config) log.Logger {
 		log.Level(cfg.Log.Level),
 		log.Pretty(cfg.Log.Pretty),
 		log.Color(cfg.Log.Color),
+		log.File(cfg.Log.File),
 	)
 }

storage/pkg/config/config.go

@@ -7,6 +7,7 @@ type Log struct {
 	Level  string
 	Pretty bool
 	Color  bool
+	File   string
 }
 
 // Debug defines the available debug configuration.