init: Add crossbox's configurations

ollama.nix

@@ -0,0 +1,22 @@
+{ config, pkgs, lib, ... }:
+
+{
+  services.ollama = {
+    enable = true;
+    host = "0.0.0.0";
+    port = 11434;
+  };
+  
+  # Open firewall port for Ollama
+  networking.firewall.allowedTCPPorts = [ 11434 ];
+  
+  # Install ollama-rocm package
+  environment.systemPackages = with pkgs; [
+    ollama-rocm
+  ];
+  
+  # Add CA certificate for Ollama
+  security.pki.certificateFiles = [
+    /home/brimlock/ollama-ca.crt
+  ];
+}