Add service ActualBudget

modules/services/actual.nix

@@ -0,0 +1,70 @@
+{
+  lib,
+  config,
+  ...
+}:
+let
+  cfg = config.my.services.actual;
+in
+{
+
+  options.my.services.actual = {
+    enable = lib.mkEnableOption "Actual Budget server (services.actual)";
+
+    settings = lib.mkOption {
+      default = { };
+      description = ''
+        Merged into services.actual.settings. Use `._secret` for file-backed
+        values per upstream Actual / NixOS module docs.
+      '';
+    };
+
+    proxy = {
+      enable = lib.mkEnableOption "Set the Caddy reverse proxy entry for this service";
+
+      domain = lib.mkOption {
+        default = "example.com";
+        type = lib.types.str;
+        description = ''
+          The domain where Caddy is reachable
+        '';
+      };
+
+      subdomain = lib.mkOption {
+        default = "budget";
+        type = lib.types.str;
+        description = ''
+          Subdomain for Actual Budget
+        '';
+      };
+
+      host = lib.mkOption {
+        default = "localhost";
+        type = lib.types.str;
+        description = ''
+          Hostname where Actual is listening
+        '';
+      };
+
+    };
+  };
+
+  config = lib.mkMerge [
+    (lib.mkIf cfg.enable {
+      services.actual = {
+        enable = true;
+        openFirewall = true;
+        settings = cfg.settings;
+      };
+    })
+
+    (lib.mkIf cfg.proxy.enable {
+      services.caddy = with cfg.proxy; {
+        virtualHosts."${subdomain}.${domain}".extraConfig = ''
+          reverse_proxy http://${host}:${toString config.services.actual.settings.port}
+          import cloudflare_${domain}
+        '';
+      };
+    })
+  ];
+}