FROM python:3.11-alpine

WORKDIR /app

# Audio stack: ffmpeg for MP3 waveform + librosa, libsndfile for soundfile
RUN apk add --no-cache \
    ffmpeg \
    ffmpeg-libs \
    libsndfile && \
    ln -sf /usr/lib/libsndfile.so.1 /usr/lib/libsndfile.so

COPY pyproject.toml .
RUN pip install --no-cache-dir .

COPY lightsync/ lightsync/

EXPOSE 8000

CMD ["python", "-m", "lightsync"]