Add config file

config.py

@@ -0,0 +1,19 @@
+from __future__ import annotations
+
+import os
+from dataclasses import dataclass
+
+
+@dataclass(frozen=True)
+class AppConfig:
+    model_name: str = "meta/llama-3.3-70b-instruct"
+    nvidia_env_key: str = "NVIDIA_API_KEY"
+    base_url: str = "https://integrate.api.nvidia.com/v1"
+
+
+def load_environment() -> str | None:
+    api_key = os.getenv(AppConfig.nvidia_env_key)
+    print(f"NVIDIA API Key loaded: {'✓' if api_key else '✗'}")
+    if not api_key:
+        print(f"⚠️  {AppConfig.nvidia_env_key} not set in environment")
+    return api_key