defp deps do
  [{:phoenix, github: "phoenixframework/phoenix", override: true},
   {:phoenix_pubsub_postgres, "~> 0.0.2"},
   {:postgrex, ">= 0.0.0"},
   {:cowboy, "~> 1.0"}]
end

config :my_app, MyApp.Endpiont,
  ...
  pubsub: [name: MyApp.PubSub,
           adapter: PhoenixPubSubPostgres,
           hostname: "localhost",
           database: "myapp_db_env",
           username: "postgres",
           password: "postgres"]