What's _application path_? https://ktor.io/docs/serving-static-content.html#folders Root directory of my project?

When using the Kotlin multiplatform Gradle plugin to configure a JVM backend as

jvm("backend")

, the application path resolves to

build/processedResources/backend/main

, so that's a few levels below the project root directory.

routing {
    static("assets") {
        files("css")
    }
}

Means there should be a folder named: css inside root of your project. And accessing

<http://host>:port/assets/stylesheet.css

 would serve the file 

/css/stylesheet.css