It's a long-winded title, but it's fitting.
I was trying to work out how to set up VestaCP so that when someone visits the IP of the server, it can go to a specific website instead of the first website that was configured, which in my case, is not desired.
So basically what made me want to do this is there seem to be a lot of domains that are still pointing to my IP and I'd like to capture that traffic and forward them to my web design page just.
What we are going to do is change the order in which VestaCP and Apache will look at websites in this case.
First, we'll edit /etc/apache2/conf.d/vesta.conf
Then move the website you want to the top of the list, then save (control+x)
Once you've done that, we need to restart nginx and apache
service apache2 restart service nginx restart
Now when you go to the website by the IP or a domain that's not hosted by you, it'll forward to the first website in that list. Neat, eh?