!

app.py

@@ -6,7 +6,6 @@ import uvicorn
 
 # --- Security Dependency ---
 
-# 1. Retrieve the server-side access key from the environment variable 'AK'
 ACCESS_KEY = os.environ.get("AK")
 
 async def verify_access_key(ak: str = Query(..., alias="AK")):
@@ -35,6 +34,15 @@ app = FastAPI(
 )
 
 
+# --- MODIFIED: Root Endpoint ---
+@app.get("/", response_class=PlainTextResponse)
+async def root():
+    """
+    Root endpoint for health checks. Returns a simple 'OK' response.
+    """
+    return "OK"
+
+
 @app.get("/ping", response_class=PlainTextResponse)
 async def ping():
     """
@@ -70,6 +78,3 @@ async def fetch_url_content(request: Request):
         except httpx.HTTPStatusError as exc:
             raise HTTPException(status_code=exc.response.status_code, detail=f"Error response {exc.response.status_code} while requesting {exc.request.url!r}.")
 
-
-#if __name__ == "__main__":
-#    uvicorn.run(app, host="0.0.0.0", port=7860)