quotes_bot.ex

defmodule QuotesBot do
  use Application

  def start(_type, _args) do
    import Supervisor.Spec, warn: false

    children = [
      worker(QuotesBot.Polling.Server, []),
      :poolboy.child_spec(:worker, poolboy_config())
    ]

    opts = [strategy: :one_for_one, name: QuotesBot.Supervisor]
    Supervisor.start_link(children, opts)
  end

  defp poolboy_config do
    [
      {:name, {:local, :worker}},
      {:worker_module, QuotesBot.Bot.Server},
      {:size, 20},
      {:max_overflow, 5}
    ]
  end
end