feat: added postgresql

modules/game/server/luanti/postgresql.nix

@@ -0,0 +1,18 @@
+{pkgs, ...}: {
+  config.services.postgresql = {
+    enable = true;
+
+    authentication = pkgs.lib.mkOverride 10 ''
+      #type database  DBuser  auth-method
+      local all       all     trust
+    '';
+
+    ensureDatabases = ["luanti_world"];
+    ensureUsers = [
+      {
+        name = "luanti_world";
+        ensureDBOwnership = true;
+      }
+    ];
+  };
+}