update docs config

README.md

@@ -1,5 +1,7 @@
 # Waffle GCS
 
+[![Hex.pm Version](https://img.shields.io/hexpm/v/waffle_gcs)](https://hex.pm/packages/waffle_gcs)
+[![waffle_gcs documentation](http://img.shields.io/badge/hexdocs-documentation-brightgreen.svg)](https://hexdocs.pm/waffle_gcs)
 [![Build Status](https://github.com/elixir-waffle/waffle_gcs/actions/workflows/elixir.yml/badge.svg?branch=main)](https://github.com/elixir-waffle/waffle_gcs/actions)
 
 Google Cloud Storage for Waffle

mix.exs

@@ -10,6 +10,7 @@ defmodule Waffle.Storage.Google.CloudStorage.MixProject do
       elixir: "~> 1.9",
       elixirc_paths: elixirc_paths(Mix.env()),
       deps: deps(),
+      docs: docs(),
       package: package(),
       source_url: "https://github.com/elixir-waffle/waffle_gcs",
       homepage_url: "https://github.com/elixir-waffle/waffle_gcs"
@@ -26,9 +27,19 @@ defmodule Waffle.Storage.Google.CloudStorage.MixProject do
 
   defp package do
     [
-      files: ~w(config/config.exs lib LICENSE mix.exs README.md),
+      files: ~w(config/config.exs lib LICENSE mix.exs README.md CHANGELOG.md),
       licenses: ["Apache-2.0"],
-      links: %{"GitHub" => "https://github.com/elixir-waffle/waffle_gcs"}
+      links: %{
+        "GitHub" => "https://github.com/elixir-waffle/waffle_gcs",
+        "CHANGELOG" => "https://github.com/elixir-waffle/waffle_gcs/blob/main/CHANGELOG"
+      }
+    ]
+  end
+
+  defp docs do
+    [
+      main: "readme",
+      extras: ["README.md", "CHANGELOG.md"]
     ]
   end