feat: Export NixOS Module for usda-vision service config

ATHENIX_INTEGRATION.md

@@ -79,13 +79,6 @@ Secrets are managed by ragenix in the athenix flake:
     owner = "root";
     group = "root";
   };
-
-  age.secrets.usda-vision-azure-env = {
-    file = ./secrets/usda-vision/azure-env.age;
-    mode = "0644";
-    owner = "root";
-    group = "root";
-  };
 }
 ```
 
@@ -108,6 +101,12 @@ Simply import the default.nix - it will access inputs and age secrets automatica
     file = ./secrets/usda-vision/env.age;
     mode = "0644";
   };
+  
+  # Optional: Configure hostname replacement (defaults shown)
+  services.usda-vision = {
+    hostname = "192.168.1.156";  # Default: 192.168.1.156
+    replaceHostnames = true;  # Default: true - replaces exp-dash/localhost
+  };
 }
 ```
 
@@ -126,9 +125,17 @@ in
   imports = [
     "${usda-dash-config}/default.nix"
   ];
+  
+  # Set a custom hostname for your deployment
+  services.usda-vision.hostname = "my-custom-host.local";
 }
 ```
 
+### Module Options
+
+- `services.usda-vision.hostname` (string, default: `"192.168.1.156"`) - Hostname or IP to replace exp-dash/localhost with
+- `services.usda-vision.replaceHostnames` (bool, default: `true`) - Whether to perform hostname replacement in docker-compose.yml
+
 ## Complete Example
 
 Here's a complete example of how it all fits together: