Trying http requests with Go

requests.go

package main

import (
	"encoding/json"
	"fmt"
	"log"
	"net/http"
	"time"
)

func main() {
	client := http.Client{
		Timeout: time.Duration(30 * time.Second),
	}
	req, err := http.NewRequest(http.MethodGet, "https://httpbin.org/get", nil)
	if err != nil {
		log.Fatalln(err)
	}

	res, err := client.Do(req)
	if err != nil {
		log.Fatalln(err)
	}
	defer res.Body.Close()

	var m map[string]interface{}
	decoder := json.NewDecoder(res.Body)
	err = decoder.Decode(&m)
	if err != nil {
		log.Fatalf("Decoder 1 error: %+v", err)
	}

	fmt.Printf("%+v\n", m)

	i := 0
	for i < 5 {
		res, err = client.Do(req)
		if err != nil {
			log.Fatalln(err)
		}
		defer res.Body.Close()

		var m map[string]interface{}
		decoder = json.NewDecoder(res.Body)
		err = decoder.Decode(&m)
		if err != nil {
			log.Fatalf("Decoder 2 error: %+v", err)
		}

		fmt.Printf("%+v\n", m)
		i++
	}
}