config.go

package main

import (
	"github.com/tkanos/gonfig"
  "fmt"
)

type Configuration struct {
	DB_USERNAME string
	DB_PASSWORD string
	DB_PORT     string
	DB_HOST     string
	DB_NAME     string
}

func GetConfig(params ...string) Configuration {
	configuration := Configuration{}
  env := "dev"
  if len(params) > 0 {
    env = params[0]
  }
  fileName := fmt.Sprintf("./%s_config.json", env)
	gonfig.GetConf(fileName, &configuration)
	return configuration
}