如何使用http4k项目中的http4k-jsonrpc？

implementation 'org.http4k:http4k-jsonrpc:3.0.0'

import org.http4k.core.Method
import org.http4k.core.Request
import org.http4k.core.Response
import org.http4k.core.Status
import org.http4k.jsonrpc.JsonRpc
import org.http4k.jsonrpc.JsonRpcHandler
import org.http4k.routing.bind
import org.http4k.routing.routes

fun main() {
    val handler: JsonRpcHandler = { request ->
        when (request.method) {
            "add" -> {
                val params = request.params
                val result = params[0].asInt + params[1].asInt
                JsonRpc.Response(result)
            }
            else -> JsonRpc.Response.Error(-1, "Method not found")
        }
    }

    val app = routes(
        "/rpc" bind JsonRpc.routes(handler)
    )

    val server = app.asServer(SunHttp(8000)).start()
    println("Server started on port 8000")

    // Stop the server when done
    server.stop()
}

curl -X POST -H "Content-Type: application/json" -d '{"jsonrpc": "2.0", "method": "add", "params": [2, 3], "id": 1}' http://localhost:8000/rpc

{"jsonrpc":"2.0","result":5,"id":1}