FROM python:3.10-slim

RUN apt-get update && apt-get install -y --no-install-recommends \
    ffmpeg libsndfile1 && rm -rf /var/lib/apt/lists/*

WORKDIR /app
ENV HF_HOME=/tmp/hf TRANSFORMERS_CACHE=/tmp/hf NUMBA_CACHE_DIR=/tmp/numba

COPY requirements.txt .
# CPU-only torch comes from the PyTorch index, but PyPI must stay reachable as a
# secondary index: --index-url alone REPLACES PyPI, and then build-time
# dependencies (flit_core, setuptools) cannot resolve at all.
RUN pip install --no-cache-dir torch==2.5.1 \
      --index-url https://download.pytorch.org/whl/cpu \
      --extra-index-url https://pypi.org/simple \
 && pip install --no-cache-dir -r requirements.txt

COPY app.py .
EXPOSE 7860
CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]