FROM python:3.13-slim

ENV PYTHONUNBUFFERED=1

# ffmpeg does the encoding; the application itself has no Python dependencies.
RUN apt-get update \
    && apt-get install --no-install-recommends -y ffmpeg \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app
COPY pyproject.toml README.md ./
COPY music_mirror.py ./
RUN pip install --no-cache-dir .

# Runs as root by default so a bind-mounted dataset of any ownership is
# writable. Override with `user:` in compose to run as the dataset's owner.
ENTRYPOINT ["music-mirror"]