Install and configure Swoosh with Mailgun

config/config.exs

@@ -112,6 +112,13 @@ config :oban_met, sketch_time_unit: :millisecond
 
 config :music_library, MusicLibrary.BackgroundRepo, priv: "priv/background_repo"
 
+config :swoosh, :api_client, Swoosh.ApiClient.Req
+
+config :music_library, MusicLibrary.Mailer,
+  adapter: Swoosh.Adapters.Mailgun,
+  api_key: "change me",
+  domain: "change me"
+
 config :fluxon, :translate_function, &MusicLibraryWeb.CoreComponents.translate_error/1
 
 # Import environment specific config. This must remain at the bottom

config/dev.exs

@@ -70,6 +70,8 @@ config :music_library, MusicLibraryWeb.Endpoint,
 # Enable dev routes for dashboard and mailbox
 config :music_library, monitoring_routes: true
 
+config :music_library, MusicLibrary.Mailer, adapter: Swoosh.Adapters.Local
+
 config :music_library, LastFm,
   refresh_interval: System.convert_time_unit(500, :second, :millisecond)
 

config/runtime.exs

@@ -74,6 +74,20 @@ if config_env() !== :test do
 end
 
 if config_env() == :prod do
+  mailgun_api_key =
+    System.get_env("MAILGUN_API_KEY") ||
+      raise """
+      environment variable MAILGUN_API_KEY is missing.
+      """
+
+  mailgun_domain =
+    System.get_env("MAILGUN_DOMAIN") ||
+      raise """
+      environment variable MAILGUN_DOMAIN is missing.
+      """
+
+  config :music_library, MusicLibrary.Mailer, api_key: mailgun_api_key, domain: mailgun_domain
+
   database_path =
     System.get_env("DATABASE_PATH") ||
       raise """

config/test.exs

@@ -88,3 +88,5 @@ config :music_library, OpenAI,
 config :phoenix_test, :endpoint, MusicLibraryWeb.Endpoint
 
 config :music_library, Oban, testing: :manual
+
+config :music_library, MusicLibrary.Mailer, adapter: Swoosh.Adapters.Test