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+# ── Stage 1: Build React frontend ─────────────────────────────────────
+FROM node:18-slim AS frontend-build
+
+WORKDIR /app/frontend
+
+# Install dependencies
+COPY frontend/package*.json ./
+RUN npm ci
+
+# Copy source and build
+COPY frontend/ ./
+# Point API to same host (served via nginx proxy)
+ENV VITE_API_BASE_URL=/api
+RUN npm run build
+
+# ── Stage 2: Final image ───────────────────────────────────────────────
+FROM python:3.10-slim
+
+# System deps for OpenCV + YOLO
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    libgl1 \
+    libglib2.0-0 \
+    libsm6 \
+    libxext6 \
+    libxrender-dev \
+    nginx \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+# ── Python deps ────────────────────────────────────────────────────────
+COPY backend/requirements.txt ./
+RUN pip install --no-cache-dir -r requirements.txt
+
+# ── Backend source ─────────────────────────────────────────────────────
+COPY backend/ ./backend/
+
+# ── Frontend build output ──────────────────────────────────────────────
+COPY --from=frontend-build /app/frontend/dist /app/frontend/dist
+
+# Copy Hajj videos so the pipeline can find them
+COPY frontend/public/hajj_real_video.mp4   ./backend/hajj_real_video.mp4
+COPY frontend/public/hajj_video_h264.mp4   ./backend/hajj_video_h264.mp4
+
+# ── Nginx config: serve frontend + proxy /api → FastAPI ───────────────
+RUN cat > /etc/nginx/sites-available/default << 'EOF'
+server {
+    listen 7860;
+    server_name _;
+
+    # Serve React build
+    root /app/frontend/dist;
+    index index.html;
+
+    # Proxy API calls to FastAPI
+    location /api/ {
+        proxy_pass         http://127.0.0.1:8000/api/;
+        proxy_http_version 1.1;
+        proxy_set_header   Host $host;
+        proxy_set_header   X-Real-IP $remote_addr;
+        proxy_read_timeout 120s;
+    }
+
+    location /health {
+        proxy_pass http://127.0.0.1:8000/health;
+    }
+
+    # SPA fallback — all unknown routes → index.html
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+}
+EOF
+
+# ── Startup script ─────────────────────────────────────────────────────
+RUN cat > /app/start.sh << 'EOF'
+#!/bin/bash
+set -e
+
+echo "Starting FastAPI backend..."
+cd /app/backend
+uvicorn api:app --host 127.0.0.1 --port 8000 &
+
+echo "Starting Nginx..."
+nginx -g "daemon off;" &
+
+wait -n
+EOF
+RUN chmod +x /app/start.sh
+
+# HuggingFace Spaces requires port 7860
+EXPOSE 7860
+
+CMD ["/app/start.sh"]