Package config in Livebook notebook

[hectorperez]

I missed that, thank you @LostKobrakai!

As a reference, I added this and it worked:

Mix.install(
  [{:openai, "~> 0.1.1"}],
  config: [
    openai: [
      api_key: "...",
      organisation_key: "...",
    ]
  ]
)