http4s-server.scala

//> using scala 3.3.0
//> using dep org.http4s::http4s-ember-server:0.23.23
//> using dep org.http4s::http4s-dsl:0.23.23

import cats.effect._
import com.comcast.ip4s._
import org.http4s.HttpRoutes
import org.http4s._
import org.http4s.dsl.io._
import org.http4s.ember.server._

object Main extends IOApp.Simple {
  val routes = HttpRoutes.of[IO] { case GET -> Root / "hello" / name =>
    Ok(s"Hello, $name.")
  }

  def run: IO[Unit] =
    EmberServerBuilder
      .default[IO]
      .withHost(ipv4"0.0.0.0")
      .withPort(port"8080")
      .withHttpApp(routes.orNotFound)
      .build
      .useForever
      .as(ExitCode.Success)
}