I do not think so. But you could add a small copyright line at the bottom of your site. And if you are concerned about copyright infringement, register your website with the US (assuming this is a US location) with the Copyright Office. You can do it online at https://www.copyright.gov/

The benefit of a registered copyright is: should you need to litigate to protect your copyrighted content, and if you win, the violator has to pay the court costs. It's worth every penny to register your copyright.