FROM python:3.11

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

# HF runs containers as UID 1000
RUN useradd -m -u 1000 user

WORKDIR /app

# Install Python deps first (cached layer)
COPY --chown=user requirements.txt requirements.txt
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir --prefer-binary -r requirements.txt

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

USER user
ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH

EXPOSE 7860

CMD ["python", "app.py"]