It's already Opensource and public. Here's the link to the project: https://github.com/openware/peatio

But... The project is an ongoing development, and it's a micro-service infrastructure composed of a ton of moving components and I've seen a lot of people over the past 3 years trying and going gray figuring out how to successfully deploy.. Here's our development group, feel free to join and browse history since we forked from original Peatio 3+ years ago: t.me/peatio

We have our own functional version with stable components: https://demo.tunex.io/trading/ethusd (never bleeding edge)

With all the moving parts it isn't easy to do the deployment, so we're doing a Giveaway for 1 lucky company, and in return we will put together an educational course on how to work with the software.

Hope this makes sense