Let's build our news application
We are going to build a news feed application to understand how to build a web application using Ktor and Kotlin. You will learn how to use Ktor and Kotlin to build a robust and testable web application  quickly with minimal effort or constraints, while also having fun with Kotlin's features.
The idea is to build a RESTful news feed application that will show a list of the latest news from various sources such as Google News. It doesn't generate the news itself. It fetches the news from various news sources.
News provider
We will be using News API from https://newsapi.org/ to fetch the latest news from various sources. It is a simple, free, and easy-to-use API that returns JSON from over 70 different sources. It is recommended to get an API key from News API because we will require it in our application later to fetch the news.
There are two APIs provided by the news provider—one to fetch news sources, and a second to fetch news articles.