Howtoforge published a guide about installing X-Cart with Nginx and Let's Encrypt SSL on Ubuntu 18.04 LTS.
How to Install X-Cart with Nginx and Let's Encrypt SSL on Ubuntu 18.04 LTS
X-Cart is an extremely flexible open-source eCommerce platform with a wide range of functions and integrations. The X-Cart source code is hosted on Github. This guide describes the process of installing X-Cart 5 on Ubuntu 18.04 LTS using Nginx as the webserver and MySQL as the database server and how to secure the installation with a free SSL Certificate from Let's encrypt.
How to Install X-Cart with Nginx and Let's Encrypt SSL on Ubuntu 18.04 LTS