Kubernetes Label (key=value) in GO

^([a-zA-Z0-9](?:[\w.\-]{0,61}[a-zA-Z0-9])?)=([a-zA-Z0-9](?:[\w.\-]{0,61}[a-zA-Z0-9])?)?$

package main

import (
	"fmt"
	"regexp"
)

func main() {
	re := regexp.MustCompile(`^([a-zA-Z0-9](?:[\w.\-]{0,61}[a-zA-Z0-9])?)=([a-zA-Z0-9](?:[\w.\-]{0,61}[a-zA-Z0-9])?)?$`)
	input := `app=myapp`
	for _, match := range re.FindAllString(input, -1) {
		fmt.Println(match)
	}
}