Update .env.example

configs/.env.example

@@ -1,5 +1,23 @@
+# === API Keys (DO NOT COMMIT REAL KEYS) ===
+GROQ_API_KEY=your_groq_key_here
+GOOGLE_API_KEY=your_google_gemini_key_here
+HF_TOKEN=your_huggingface_token_here
+
+# === Provider order ===
+# Comma-separated cascade, first working provider wins.
+# Options: groq, gemini, router
+PROVIDER_ORDER=groq,gemini,router
+
+# === Provider-default models (override if needed) ===
+GROQ_MODEL=llama-3.1-8b-instant
+GEMINI_MODEL=gemini-2.5-flash
+
+# === Logging ===
+LOG_LEVEL=INFO
+
+
+
 # For local development only. Use Space Secrets in production.
-HF_TOKEN="your_hugging_face_write_token"
 ADMIN_TOKEN="a-secure-admin-token-for-index-refresh"
 
 # --- Optional Overrides ---