config.go
func LoadWithEnvBytes(conf interface{}, src []byte) error {
	return loadConfigBytes(conf, src, envReplacer, yaml.Unmarshal)
}
func LoadWithEnvBytes(conf interface{}, src []byte) error {
	return loadConfigBytes(conf, src, envReplacer, yaml.Unmarshal)
}
// LoadWithEnvBytes loads YAML bytes with Env