"Push SparkJava to the next level with Koin" - How to go further a simple hello world and begin to develop a more concrete app with Koin. This last will bring to your app modularity and testability ... Koin your next SparkJava companion - https://medium.com/koin-developers/pushing-sparkjava-to-the-next-level-with-koin-ed1f0b80953e