package main

import (
    "fmt"
    logos"

    github.com/urfave/cli"
)

func main() {
    app := cli.NewApp()
    var flags []cli.Flag
    flags = append(flags,cli.StringFlag{
        Name:  host,Value: 0.0.0.0bind hostport,p5090bind portenv,eprodruntime environment,dev|test|prod flags

    app.Action = func(c *cli.Context) error {

        fmt.Println(host:",c.String())
        port:portenv:env))
        return nil
    }

    err := app.Run(os.Args)
    if err != nil {
        log.Fatal(err)
    }
}