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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"]