Added Tutorial Comment

Author: Jakkoble

src/main/kotlin/de/jakkoble/Application.kt

@@ -16,4 +16,5 @@ fun main() {
 Simple Kotlin/Ktor API Example by Jakkoble
 To test the API go to http://localhost:8080
 The List is just saved in Runtime => if you stop the Server, the List is gone
+In the Frontend (Main Page), JavaScript is used to make the Request to the API Endpoints (Routes) on Button Click
 */