That's a great question! We're focused on the design iteration process, with the expectation that you would hand off to a developer for implementation, as there are a number of decisions that are generally made during implementation side for specific interactions and functionality. However, one thing you can do right now is export images for production. If you select File > Export, you'll see a number of options at the bottom that will export both high-res and low-res versions of your assets (or SVG) for usage on desktop and mobile implementations of your website.
Hope that helps!