Can I serve my compose application using ktor? I want to create a server that hosts a rest API for all platforms and also the web version Right now I only succeeded in running the compose application as a kotlin/js application

Yes. The resulting JS files are plain normal static JS files you can serve like any other static file with Ktor (or any other platform like GitHub pages, etc.)

Is Github pages free?

Yes, if your pages will be public accessible.

Do I have to use browser instead of nodejs?

To deploy a static JS webpage you don't need nodejs, just research how to serve files with ktor and deploy ktor in any cloud hosting alternative. I use Google AppEngine but there is many. If no need ktor, just a JS webpage you can use firebase hosting, is free, however a custom domain and features like that you have to pay.

Creating a ktor server that serves static files is easy! Check out: https://ktor.io/docs/serving-static-content.html If you're using GHP however, all you need to do is check in the html / js files to the right place and it will serve them for you.

Where does gradle generate the static files for ktor?

My recommendation to figure out what Gradle is doing is by going into your project, running

./gradlew clean

, and then running

./gradlew build

. Then, search your

build/

folder for

*.js

files.