Malware monitoring / on-line scanner

Hi everyone, I would appreciate some help! I'm finishing installing a new linode website (CentOS, Nginx, php, etc).

I'd like to know which on-line malware scanners would you reccomend me in order to be alerted if for some reason my website is hacked and some kind of malware is installed (ransomware kit/etc).

Thanks in advance for your comments.

LU