Update CI server configuration

servers/ci.nix

@@ -1,45 +0,0 @@
-{ pkgs, ... }:
-{
-  networking.firewall.trustedInterfaces = [ "br-+" ];
-
-  services.gitea-actions-runner = {
-    package = pkgs.forgejo-runner;
-    instances.default = {
-      enable = true;
-      name = "ci.sinerva.eu";
-      url = "https://forgejo.sinerva.eu";
-      tokenFile = "/persist/secrets/forgejo_token";
-      labels = [
-        "ubuntu-24.04-lts:docker://ubuntu:24.04"
-        "ubuntu-22.04:docker://node:24-bullseye"
-        "nixos-latest:docker://nixos/nix"
-      ];
-      settings = {
-        container = {
-          network = "";
-          enable_ipv6 = true;
-        };
-      };
-    };
-  };
-
-  virtualisation.docker = {
-    enable = true;
-    daemon.settings = {
-      fixed-cidr-v6 = "fd72:23ed:7025::/64";
-      ipv6 = true;
-      ip6tables = true;
-      experimental = true;
-      default-address-pools = [
-        {
-          base = "172.30.0.0/16";
-          size = 24;
-        }
-        {
-          base = "fd4e:cdc2:4c34::/64";
-          size = 96;
-        }
-      ];
-    };
-  };
-}