package main

import (
	"encoding/base64"
	"fmt"
	"io/ioutil"
	"os"
)

func main() {
	f, err := os.Open("unicorn.png")
	if err != nil {
		panic(err)
	}
	bytes, err := ioutil.ReadAll(f)
	if err != nil {
		panic(err)
	}
	fmt.Println(base64.StdEncoding.EncodeToString(bytes))
}