added root page so hf won't error out

src/main.py

@@ -57,6 +57,34 @@ async def handle_preflight(request: Request, full_path: str):
         }
     )
 
+# Root endpoint - no authentication required
+@app.get("/")
+async def root():
+    """
+    Root endpoint providing project information.
+    No authentication required.
+    """
+    return {
+        "name": "geminicli2api",
+        "description": "OpenAI-compatible API proxy for Google's Gemini models via gemini-cli",
+        "purpose": "Provides both OpenAI-compatible endpoints (/v1/chat/completions) and native Gemini API endpoints for accessing Google's Gemini models",
+        "version": "1.0.0",
+        "endpoints": {
+            "openai_compatible": {
+                "chat_completions": "/v1/chat/completions",
+                "models": "/v1/models"
+            },
+            "native_gemini": {
+                "models": "/v1beta/models",
+                "generate": "/v1beta/models/{model}/generateContent",
+                "stream": "/v1beta/models/{model}/streamGenerateContent"
+            },
+            "health": "/health"
+        },
+        "authentication": "Required for all endpoints except root and health",
+        "repository": "https://github.com/user/geminicli2api"
+    }
+
 # Health check endpoint for Docker/Hugging Face
 @app.get("/health")
 async def health_check():