Moving Main Navigation to Left Side of Page

I am creating a new site and the client has requested that the navigation runs down the left side of the page as opposed to the top of the page. They provided this example, which looks to be a squarespace site: https://www.macrodosenyc.com/

How can we achieve this?

You can use Well Template to achieve this. In case you are using 7.1 version, you can share link, we can give code to achieve similar layout