add copyparty to starr group

mount nix store in runner container

modules/gitea/thea/virtualisation.nix

@@ -42,6 +42,7 @@
         };
         volumes = [
           "/var/run/docker.sock:/var/run/docker.sock"
+          "/nix/store:/nix/store"
           "${runner_config}:/config.yml:ro"
         ];
       };