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FROM python:3.10-slim

WORKDIR /app

# Install system dependencies including FFmpeg dev libs (required by av/demucs)
RUN apt-get update && apt-get install -y --no-install-recommends \
    git \
    git-lfs \
    ffmpeg \
    libavformat-dev \
    libavcodec-dev \
    libavdevice-dev \
    libavutil-dev \
    libavfilter-dev \
    libswscale-dev \
    libswresample-dev \
    pkg-config \
    libsm6 \
    libxext6 \
    && rm -rf /var/lib/apt/lists/*

# Copy and install Python dependencies
COPY requirements.txt .
RUN pip install --no-cache-dir --extra-index-url https://download.pytorch.org/whl/cpu -r requirements.txt

# Copy app files
COPY . .

# Create non-root user for HF Spaces
RUN useradd -m -u 1000 user
USER user

EXPOSE 7860

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