Personally, as someone with limited familiarity with Erlang, I had difficulty reading this site on mobile, due to the text wrapping on mobile. Maybe it's more intelligible to someone who's familiar with the language, but I would have appreciated scrollable, full width code blocks instead of text wrapping.
Sample output of it running would've been nice too. "Show me, don't tell."
Also, a mirror of each example in Elixir would've been helpful and likely cleaner to read.