Ah, you are correct! I’ll work on getting that updated, but I was also meaning to provide configuration examples for the elixir-ls elixir-lsp fork (and other projects). So I created a wiki post on this forum: Emacs - Elixir Setup Configuration Wiki. Specifically you want the elixir-ls elixir-lsp fork configuration
section. Let me know if that makes sense/works for you, or even better just edit the post directly!
Also if anyone wants to contribute to the elixir-ls elixir-lsp fork, then hang out in the #alchemist-dev
channel of the Elixir Slack (and maybe the #language-server
channel but that isn’t very active).