Express is a web application framework for Node.js, released as free and open-source software under the MIT License. It is designed for building web applications and APIs.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Swagger UI is a collection of HTML, JavaScript, and CSS assets that dynamically generate documentation from a Swagger-compliant API.
Ubuntu is a free and open-source operating system on Linux for the enterprise server, desktop, cloud, and IoT.