Dockerfile

FROM python:3.12-slim

# System deps for audio processing
RUN apt-get update && apt-get install -y --no-install-recommends \
    ffmpeg libsndfile1 && \
    rm -rf /var/lib/apt/lists/*

# Create non-root user (HF Spaces requirement)
RUN useradd -m -u 1000 user
USER user
ENV HOME=/home/user PATH="/home/user/.local/bin:$PATH"

WORKDIR /app

# Install Python deps (CPU-only PyTorch to save space)
COPY --chown=user requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy app code
COPY --chown=user . .

# HF Spaces requires port 7860
EXPOSE 7860

CMD ["gunicorn", "app:app", "--bind", "0.0.0.0:7860", "--timeout", "300", "--workers", "1"]