Dockerfile

# ─────────────────────────────────────────────
# Stage 1: Build React frontend
# ─────────────────────────────────────────────
FROM node:20-alpine AS frontend-builder

WORKDIR /app/frontend

# Install dependencies first (layer cache)
COPY frontend/package.json frontend/package-lock.json* ./
RUN npm ci

# Copy source and build
COPY frontend/ .
RUN npm run build


# ─────────────────────────────────────────────
# Stage 2: Python backend (production image)
# ─────────────────────────────────────────────
FROM python:3.11-slim

WORKDIR /app

# Install Python dependencies
COPY backend/requirements.txt ./requirements.txt
RUN pip install --no-cache-dir -r requirements.txt

# Copy backend and shared source
COPY backend/ ./backend/
COPY models/ ./models/

# Copy compiled React app from Stage 1
COPY --from=frontend-builder /app/frontend/dist ./frontend/dist

# HF Spaces requires non-root user with uid 1000
RUN useradd -m -u 1000 appuser
USER appuser

# HF Spaces requires port 7860
EXPOSE 7860

CMD ["uvicorn", "backend.main:app", "--host", "0.0.0.0", "--port", "7860"]