nginx restructure

hosts/md/postgres.nix

@@ -0,0 +1,23 @@
+{ config, pkgs, ... }:
+
+{
+  services = {
+    postgresql = {
+      enable = true;
+      package = pkgs.postgresql_18;
+      enableJIT = true;
+      initdbArgs = [
+        "--locale=C"
+        "--encoding=UTF8"
+      ];
+      ensureUsers = [{ name = cfg.db.username; ensureDBOwnership = true; }];
+      ensureDatabases = [ cfg.db.database ];
+    };
+    postgresqlBackup = {
+      enable = true;
+      startAt = "*-*-* 09:00:00";
+      compression = "zstd";
+    };
+  };
+}
+