private def loadConfig[F[_]: Delay: Blocks: Console: Monad] = {
    val overwrite = Option(System.getenv("HEALER_CONFIG"))
      .orElse(Option(System.getProperty("add.config.file")))

    for {
      default <- blockingDelay[F](ConfigFactory.load())
      res     <- overwrite.foldM(default)((default, path) =>
                   putStrLn[F](s"loading additional config file $path") *>
                     blockingDelay[F](ConfigFactory.parseFile(Paths.get(path).toFile).withFallback(default).resolve())
                 )
    } yield res
  }