FROM python:3.10-slim

WORKDIR /app

# Install system deps (ffmpeg for audio playback + build essentials for librosa)
RUN apt-get update && apt-get install -y --no-install-recommends ffmpeg build-essential && rm -rf /var/lib/apt/lists/*

COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

COPY . .

ENV PORT=8080

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