I've built my own cool URL shortener with the name Sli.cx. I tested some functionalities of node libraries, thats why I started this project.
I love the power of Next.js and all the function from static site generation till server side rendering. For this page I decided to use Next.js.
In terms of css I used Tailwind CSS. This is basically a utility-first CSS framework for rapidly building custom user interfaces. It is a highly customizable, low-level CSS framework that gives you all of the building blocks you need to build bespoke designs without any annoying opinionated styles you have to fight to override.
Just a classic node express server which serves a static generated website.
This page is hosted on the PaaS from Vercel which is also the company behind Next.js. I have not used the general hosting but the Vercel CLI with custom server hosting.