learning_elixir_start_link.ex

defmodule LearningElixir.Router do
  use Plug.Router

  plug :match
  plug :dispatch

  def start_link do
    {:ok, _} = Plug.Adapters.Cowboy.http LearningElixir.Router, [], [port: 4001]
  end

  get "/" do
    send_resp(conn, 200, "Hello")
  end

  match _ do
    send_resp(conn, 404, "oops")
  end
end