fun main() {
    val name = getQueryParam("name") ?: "World"
    val response = """{"message": "Hello, $name!", "timestamp": "${getTimestamp()}"}"""
    respond(200, response)
}

fun getQueryParam(name: String): String? {
    return null
}

fun getTimestamp(): String {
    return "2024-01-01T00:00:00Z"
}

fun respond(status: Int, body: String) {
    println(body)
}