func GetConf(fileName string) (*Root, error) {
	pwd, err := os.Getwd()
	if err != nil {
		return nil, err
	}
	basePath := fmt.Sprintf("%s/../../configs", pwd)
	return newConf(fmt.Sprintf("%s/%s", basePath, fileName))
}
GetConf returns *Root for unittest
e.g. `conf, err = config.GetConf("settings.toml")`
package config
import (
	"fmt"
	"os"
)