DemoApplication.java

import io.javalin.Javalin;

public class DemoApplication {
    public static void main(String[] args) {
        int port = Integer.parseInt(System.getenv().getOrDefault("PORT", "7860"));

        Javalin app = Javalin.create().start(port);

        app.get("/", ctx -> ctx.result("Hello from Javalin on Hugging Face!"));
        app.get("/ping", ctx -> ctx.result("pong"));
    }
}