Add shared services infrastructure for cross-host data

Created centralized service definitions in shared/services.nix to store
service metadata (domains, IPs, ports) that need to be accessible across
multiple hosts. This replaces the per-service split DNS module approach
with a single source of truth.

Services are now exported through utils.nix for easy access in host configs.

hosts/alexandria/librespeed.nix

@@ -1,39 +0,0 @@
-{
-  config,
-  lib,
-  inputs,
-  ...
-}:
-
-let
-  utils = import ../../utils.nix { inherit inputs lib; };
-  inherit (utils) mkNginxVHosts;
-in
-
-{
-  virtualisation.oci-containers.containers."librespeed" = {
-    image = "lscr.io/linuxserver/librespeed:latest";
-    environment = {
-      TZ = "America/Bahia";
-    };
-    ports = [ "127.0.0.1:58080:80" ];
-    extraOptions = [
-      "--pull=newer"
-      "--label=io.containers.autoupdate=registry"
-    ];
-  };
-
-  services.nginx.virtualHosts = mkNginxVHosts {
-    acmeHost = "baduhai.dev";
-    domains."speedtest.baduhai.dev".locations."/".proxyPass = "http://127.0.0.1:58080/";
-  };
-
-  # Register this domain for split DNS
-  services.splitDNS.entries = [
-    {
-      domain = "speedtest.baduhai.dev";
-      lanIP = "192.168.15.142";
-      tailscaleIP = "100.76.19.50";
-    }
-  ];
-}

shared/services.nix

@@ -0,0 +1,39 @@
+# Shared service definitions for cross-host configuration
+# Used by:
+# - alexandria: DNS server (LAN) + service hosting (vaultwarden, nextcloud, jellyfin)
+# - trantor: DNS server (Tailnet) + service hosting (forgejo)
+{
+  services = [
+    {
+      name = "vaultwarden";
+      domain = "vault.baduhai.dev";
+      host = "alexandria";
+      lanIP = "192.168.15.142";
+      tailscaleIP = "100.76.19.50";
+      port = 8222;
+    }
+    {
+      name = "forgejo";
+      domain = "git.baduhai.dev";
+      host = "trantor";
+      tailscaleIP = "100.108.5.90";
+      port = 3000;
+    }
+    {
+      name = "nextcloud";
+      domain = "cloud.baduhai.dev";
+      host = "alexandria";
+      lanIP = "192.168.15.142";
+      tailscaleIP = "100.76.19.50";
+      port = 443;
+    }
+    {
+      name = "jellyfin";
+      domain = "jellyfin.baduhai.dev";
+      host = "alexandria";
+      lanIP = "192.168.15.142";
+      tailscaleIP = "100.76.19.50";
+      port = 8096;
+    }
+  ];
+}

utils.nix

@@ -8,9 +8,14 @@ let
     home-manager
     agenix
     ;
+
+  # Import shared service definitions
+  sharedServices = import ./shared/services.nix;
 in
 
 {
+  # Re-export shared services for use in host configs
+  inherit (sharedServices) services;
   # Tag-based host configuration system
   mkHost =
     {
@@ -196,27 +201,24 @@ in
   mkSplitDNS =
     entries:
     let
-      # Generate view entries for a single domain
+      # Generate local-data entries for all domains
-      mkEntry =
+      tailscaleData = map (e: ''"${e.domain}. IN A ${e.tailscaleIP}"'') entries;
-        {
+      lanData = map (e: ''"${e.domain}. IN A ${e.lanIP}"'') entries;
-          domain,
+    in
-          lanIP,
-          tailscaleIP,
-        }:
     [
+      # Single Tailscale view with all domains
       {
         name = "tailscale";
         view-first = true;
         local-zone = ''"baduhai.dev." transparent'';
-            local-data = ''"${domain}. IN A ${tailscaleIP}"'';
+        local-data = tailscaleData;
       }
+      # Single LAN view with all domains
       {
         name = "lan";
         view-first = true;
         local-zone = ''"baduhai.dev." transparent'';
-            local-data = ''"${domain}. IN A ${lanIP}"'';
+        local-data = lanData;
       }
     ];
-    in
-    builtins.concatMap mkEntry entries;
 }