add authentik to Drone

modules/nixos/homeserver/authentik.nix

@@ -0,0 +1,20 @@
+{ inputs, config, ... }:
+
+{
+  imports = [ inputs.authentik-nix.nixosModules.default ];
+  nix.settings = {
+    substituters = [ "https://nix-community.cachix.org" ];
+    trusted-public-keys = [ "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs=" ];
+  };
+
+  services.authentik = {
+    enable = true;
+    environmentFile = config.sops.secrets."authentik/secrets.env".path;
+
+    settings = {
+      disable_startup_analytics = true;
+      disable_update_check = true;
+      avatars = "initials";
+    };
+  };
+}