[amorphid]

The docs for Mix are decent. You can start here:

https://hexdocs.pm/mix.

When you are trying to get help w/ a specific task, you check checkout the mix tasks docs:

https://hexdocs.pm/mix/Mix.Tasks.Deps.Get.html#content

And honestly, I often just look at the source code:

https://github.com/elixir-lang/elixir/tree/master/lib/mix

The Elixir Slack channel is pretty amazing, too:

https://elixir-slackin.herokuapp.com/