@Sagakom:
For a web shop or an e-commerce website you need a dynamic website. In other words: a website that runs on the servers and is build with PHP, Java or Node.js. Publii is static website generator and CMS that is installed on the desktop. When you publish a website with Publii only static code (HTML and CSS) and client-side code (JavaScript) is pushed to the server. So with Publii alone it’s not possible to create a web shop or an e-commerce website. Having said that: maybe there is an online service with which you can embed web shop or e-commerce functionality into the static website?
Hopefully this comment is helpful to you.