feat(zaatar): enable spotifyd

systems/zaatar/spotifyd.nix

@@ -0,0 +1,24 @@
+{ config, pkgs, lib, ... }:
+{
+  services.spotifyd = {
+    enable = true;
+    settings = {
+      global = {
+        username = lib.strings.fileContents <secrets/spotify/username>;
+        password = lib.strings.fileContents <secrets/spotify/password>;
+        backend = "pulseaudio";
+        bitrate = 320;
+        device_type = "s_t_b"; # set-top box
+        device_name = config.networking.hostName;
+      };
+    };
+  };
+
+  # ref https://github.com/NixOS/nixpkgs/issues/71362#issuecomment-753461502
+  hardware.pulseaudio.extraConfig = ''
+    unload-module module-native-protocol-unix
+    load-module module-native-protocol-unix auth-anonymous=1
+  '';
+
+  systemd.services.spotifyd.serviceConfig.Restart = "always";
+}