Add compose and attic configurations

Add compose directory to store docker/podman compose files for running
on the TrueNAS box
Add attic configurations to auto-listen on all my home boxes to upload
builds
Update nix-conf to support reading from the Attic server

modules/nixos/home.nix

@@ -1,4 +1,9 @@
-{ config, lib, ... }:
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
 
 let
   cfg = config.greg.home;
@@ -13,7 +18,33 @@ with lib;
   };
 
   config = mkIf cfg {
-    time.timeZone = "America/Chicago";
+    age.secrets.attic.file = ../../secrets/attic.age;
     networking.domain = "thehellings.lan";
+    time.timeZone = "America/Chicago";
+
+    systemd.services.attic-client = {
+      enable = true;
+      description = "Attic client watch-store service";
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+      serviceConfig = {
+        Type = "simple";
+        Restart = "on-failure";
+        RestartSec = "5s";
+      };
+      preStart = ''
+        set -x
+        mkdir -p $XDG_CONFIG_HOME/attic
+        cp ${config.age.secrets.attic.path} $XDG_CONFIG_HOME/attic/config.toml
+      '';
+      script = "${pkgs.attic-client}/bin/attic watch-store default";
+      environment = {
+        XDG_CONFIG_HOME = "/var/lib/attic-client";
+      };
+    };
+
+    systemd.tmpfiles.rules = [
+      "d /var/lib/attic-client 0755 root root -"
+    ];
   };
 }