Update Ollama configuration and add Open WebUI support

- Fix ollama module by removing invalid meta section
- Update grey-area ollama service configuration:
  - Change host binding to 0.0.0.0 for external access
  - Remove invalid rsyslog configuration
  - Enable firewall access
- Add Open WebUI module with proper configuration:
  - Integrate with Ollama API at localhost:11434
  - Disable authentication for development
  - Open firewall on port 8080
- Successful test build of grey-area configuration

modules/services/ollama.nix

@@ -430,10 +430,4 @@ in {
       "d ${cfg.dataDir}/runners 0755 ${cfg.user} ${cfg.group} -"
     ];
   };
-
-  meta = {
-    maintainers = ["Geir Okkenhaug Jerstad"];
-    description = "NixOS module for Ollama local LLM service";
-    doc = ./ollama.md;
-  };
 }

modules/services/open-webui.nix

@@ -0,0 +1,29 @@
+# Open WebUI Service Configuration
+#
+# This module provides Open WebUI configuration for interacting with Ollama
+# Open WebUI provides a user-friendly web interface for local LLMs
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}: {
+  # Enable the built-in NixOS open-webui service
+  services.open-webui = {
+    enable = true;
+    port = 8080;
+    host = "0.0.0.0";
+
+    environment = {
+      ANONYMIZED_TELEMETRY = "False";
+      DO_NOT_TRACK = "True";
+      SCARF_NO_ANALYTICS = "True";
+      OLLAMA_API_BASE_URL = "http://127.0.0.1:11434";
+      # Disable authentication for easier development access
+      WEBUI_AUTH = "False";
+    };
+  };
+
+  # Open firewall for web interface
+  networking.firewall.allowedTCPPorts = [ 8080 ];
+}