ZIO layer for Postgres test container

testcontainer.scala

import com.dimafeng.testcontainers.PostgreSQLContainer
import zio.blocking.{effectBlocking, Blocking}
import zio.{Has, ZLayer, ZManaged}

object TestContainer {
  type Postgres = Has[PostgreSQLContainer]

  def postgres(version: Option[String] = None): ZLayer[Blocking, Throwable, Postgres] =
    ZManaged.make {
      effectBlocking {
        val container = new PostgreSQLContainer(
          dockerImageNameOverride = version
            .map(version => s"postgres:$version")
            .orElse(Some("postgres"))
        )
        container.start()
        container
      }
    }(container => effectBlocking(container.stop()).orDie).toLayer
}