hiroshi: Add postgresql

machines/hiroshi/configuration.nix

@@ -2,6 +2,8 @@
 #
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
+{ pkgs, ... }:
+
 {
   imports = [
     ./hardware-configuration.nix
@@ -30,4 +32,20 @@
   system.stateVersion = "24.05";
 
   networking.firewall.allowedTCPPorts = [ 80 443 ];
+
+  services.postgresql = {
+    enable = true;
+    package = pkgs.postgresql_16;
+  };
+
+  services.postgresqlBackup = {
+    enable = true;
+    startAt = [ ]; # triggered by restic system backup
+    location = "/var/lib/postgresql-backup";
+    compression = "none";
+  };
+  systemd.services.restic-backups-system = {
+    after = [ "postgresqlBackup.service" ];
+    wants = [ "postgresqlBackup.service" ];
+  };
 }