FROM python:3.12-slim

WORKDIR /app

RUN apt-get update && apt-get install -y --no-install-recommends \
    libpq-dev gcc \
    && rm -rf /var/lib/apt/lists/*

COPY requirements.txt .
# CPU-only torch first — sentence-transformers would otherwise pull the much larger CUDA wheels,
# which are useless in this container and roughly double the image size.
RUN pip install --no-cache-dir torch==2.5.1 --index-url https://download.pytorch.org/whl/cpu
RUN pip install --no-cache-dir -r requirements.txt

COPY . .

EXPOSE 8000

CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]