You're really missing a short paragraph describing the exact service you're providing, you have a nice headline, website looks fine, list a lot of features, but I'm only vaguely aware of what varnish exactly is. Why should I want this?

What exactly is your target audience? Perhaps not me, and then it's ok. Do you think all your target visitors know what Varnish is, if they have it or not, if they need it or not, if they need your service to get varnish, etc.

Not an expert, just my personal experience on the site. I run a couple of my own sites, know on a basic level how to run websites, I feel like I might be close to the target audience, but perhaps not.