Send notifcation to specified slack channel every monday 9am if there is a update avaliable for elastic search in prod us-east-1 or us-west-2
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To push update to lambda
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run ./deploy.sh {s3-bucket} {env} {region} {lambda-prefix} "SlackChannel={channelname} DomainName={elastic domain name} Region={region} SlackWebhookUrl={slackwebhookurl}"