Dockerfile

FROM python:3.11-slim

RUN apt-get update && apt-get install -y --no-install-recommends curl ffmpeg libsndfile1 && \
    curl -fsSL https://deb.nodesource.com/setup_20.x | bash - && \
    apt-get install -y --no-install-recommends nodejs && \
    rm -rf /var/lib/apt/lists/*

WORKDIR /app

# CPU-only torch (saves ~1.5GB vs default CUDA build)
RUN pip install --no-cache-dir torch --index-url https://download.pytorch.org/whl/cpu

RUN pip install --no-cache-dir \
    fastapi "uvicorn[standard]" python-multipart \
    librosa numpy scipy soundfile \
    "transformers>=4.40.0" accelerate \
    yt-dlp "nnAudio>=0.3.2"

COPY app/ app/

RUN useradd -m -u 1000 user && chown -R user:user /app
USER user

ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH \
    HF_HOME=/home/user/.cache/huggingface

EXPOSE 7860

CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "7860"]