check every hour if my dns manager has allowed github pages redirect, send a text message if it has

dns_check.sh

#!/bin/bash

#one hour (in seconds)
wait=$((60 * 60))

while true
do
	dns=$(dig andykais.com +nostats +nocomments +nocmd)
	if [[ $dns == *"github"* ]]
	then
		#if dns response contains github then send a text message
		echo "DNS control has changed!" | mail -s "andykais.com" [email protected]
	fi
	sleep $wait
done