Elixir and MongoDB

Thanks for this. But what do you need to do to get it to run?
I’m on Elixir 1.11.1. My mix.exs has

  defp deps do
    [
      {:gettext, "~> 0.11"},
      {:mongodb_driver, "~> 0.7.0"},
      {:mongodb, "~> 0.5.1"}
    ]
  end

and my app is start.exs:

#! /usr/bin/env elixir

defmodule MongoExample do
  def example1() do

    {:ok, conn} = Mongo.start_link(url: "mongodb://localhost:27017/db-1")
    cursor = Mongo.find(conn, "test-collection", %{})

    cursor
    |> Enum.to_list()
    |> IO.inspect
  end
end 

MongoExample.example1()

Mongo is running, but when I run the app, I just get “Mongo.start_link/1 is undefined (module Mongo is not available)”