VirusTotal does not scan websites.

The last website that might've had malware on it was on 13th of January 2016 (a year ago).
Eh no. The last detection in my scans show 20170105 as latest detection(s).
Is there anyway you could whitelist the IP? There is no malware or anything similar on the website.
No, I can't "whitelist" the domain and/or IP as I am not working for avast. Besides that, avast will not whitelist a IP unless there are zero domains on it that host/spread malware/are malicious.

You can ask avast to remove your domain from their blacklist.
https://www.avast.com/report-a-url.php
But is is up to avast if they will do so or not.
It can be they have detected things the few scans I have run do not show.

About the JQuery issue…
Seems to me you have done a good job.
http://retire.insecurity.today/#!/scan/378037447b2149c3a2f7ca1208659af377a3f983e513cbcc5870ede19f2f9265
No more alert(s) on that :slight_smile:

As I said before, the problem is likely the shared hosting that you are using but only someone from avast can tell for sure.
A real easy way to avoid it is using dedicated hosting or using a host(er) that cares about security and is very active in removing malicious domains.