update gitlab runner config

flake.nix

@@ -42,6 +42,7 @@
       lib = nixpkgs.lib;
       common_modules = [
         ./system/configuration.nix
+        ./system/gitlab-runner.nix
         # nur.nixosModules.nur
         inputs.hyprland.nixosModules.default
         {

system/gitlab-runner.nix

@@ -0,0 +1,18 @@
+{ config, pkgs, lib, ... }: {
+  boot.kernel.sysctl."net.ipv4.ip_forward" = true;
+  virtualisation.docker.enable = true;
+  services.gitlab-runner = with lib; {
+    enable = true;
+    concurrent = 4;
+    services = {
+      ci_test = {
+        registrationConfigFile = "/srv/gitlab-runner/env/ci_test";
+        dockerImage = "debian";
+      };
+      thoreb_builder = {
+        registrationConfigFile = "/srv/gitlab-runner/env/thoreb_builder";
+        dockerImage = "debian";
+      };
+    };
+  };
+}