three17.scala

def startServer(): Unit = {

  import scala.concurrent.Await
  import scala.concurrent.duration._
  import akka.http.scaladsl.server.Directives._
  import akka.http.scaladsl.server.Route
  import akka.http.scaladsl.Http
  import akka.actor.ActorSystem
  import akka.stream.ActorMaterializer

  val routes: Route = getBooksRoute ~ getBookCoverRoute ~ addBookRoute
  implicit val actorSystem: ActorSystem = ActorSystem()
  implicit val materializer: ActorMaterializer = ActorMaterializer()
  Await.result(Http().bindAndHandle(routes, "localhost", 8080), 1.minute)
  println("Server started!")
}