Ciris hello world Monix version

Main.scala

package exercise.ciris.qiita3

import cats.effect.ExitCode.{Error, Success}
import cats.effect.{ExitCode, Sync}
import cats.syntax.functor._
import ciris.api.{Apply => CApply}
import ciris.cats.effect._
import ciris.{envF, loadConfig}
import monix.eval.{Task, TaskApp}
import scala.language.higherKinds

case class Config(name: String)

object Main extends TaskApp {
  def config[F[_]: CApply] = loadConfig(envF[F, String]("NAME"))(Config)
  def program[F[_]: Sync](c: Config) = Sync[F].delay { println(s"Hello, ${c.name}!") }

  def run(args: List[String]): Task[ExitCode] = for {
    r <- config[Task].result
    x <- r.fold(
      e => Task(println(e.message)) as Error,
      c => program[Task](c)         as Success
    )
  } yield x
}