Improved Storage module to support fs and minio.

storage/minio.go

@@ -95,8 +95,8 @@ func NewMinio(cfg config.Config) (Storage, error) {
 		mio.secret = opts.Secret
 		mio.secure = opts.Secure
 	}
-	if s := cfg.GetString("root"); s == "" {
-		return nil, fmt.Errorf("root can not be empty")
+	if s := cfg.GetString("bucket"); s == "" {
+		return nil, fmt.Errorf("bucket can not be empty")
 	} else {
 		mio.bucket = s
 	}