func connectionURIFromEnvConfig() string {
	errMsg := "no valid connection string provided"

	connConfig, err := url.Parse(os.Getenv("DB_PORT"))
	if err != nil {
		log.Fatalln(errMsg)
	}

	dbHost, dbPort, err := net.SplitHostPort(connConfig.Host)
	if err != nil {
		log.Fatalln(errMsg)
	}

	dbName := os.Getenv("DB_DATABASE")
	dbUser := os.Getenv("DB_USER")
	dbPass := os.Getenv("DB_PASSWORD")

	if dbHost == "" || dbPort == "" || dbName == "" || dbUser == "" || dbPass == "" {
		log.Fatalln(errMsg)
	}

	return "postgres://" + dbUser + ":" + dbPass + "@" + dbHost + "/" + dbName
}