fix: update ONNX URLs and remove Docker HEALTHCHECK for HF Spaces

Dockerfile

@@ -39,10 +39,8 @@ COPY --chown=user:user . /app
 
 EXPOSE 7860
 
-# ─── 6. Health check ──────────────────────────────────────────────────────────
-# Using 127.0.0.1 instead of localhost to prevent IPv6 DNS resolution issues 
-# which can cause the healthcheck to fail on some Linux kernels.
-HEALTHCHECK --interval=30s --timeout=15s --start-period=180s --retries=5 \
-    CMD python -c "import urllib.request; urllib.request.urlopen('http://127.0.0.1:7860/health', timeout=10)" || exit 1
+# Note: We omit custom Docker HEALTHCHECK here because Hugging Face Spaces 
+# automatically orchestrates and probes port 7860. A custom Docker healthcheck 
+# can conflict and cause the Space to hang in "Starting".
 
 CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7860"]

app/core/model_downloader.py

@@ -35,8 +35,8 @@ _MODELS: list[dict] = [
     {
         "name": "yolov8n.onnx",
         "urls": [
-            "https://github.com/ultralytics/assets/releases/download/v8.2.0/yolov8n.onnx",
-            "https://huggingface.co/Bingsu/yolov8/resolve/main/yolov8n.onnx"
+            "https://github.com/ibaiGorordo/ONNX-YOLOv8-Object-Detection/raw/main/models/yolov8n.onnx",
+            "https://huggingface.co/spaces/yash2406/YOLOv8-Object-Detection-using-ONNX/resolve/main/models/yolov8n.onnx"
         ],
         "dest_dir_key": "ml_models",
     },