FROM python:3.12-slim

WORKDIR /app

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

# Install dependencies first (cache layer)
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Pre-download default model into the image
ARG EMBEDDING_MODEL=all-MiniLM-L6-v2
RUN python -c "from sentence_transformers import SentenceTransformer; SentenceTransformer('${EMBEDDING_MODEL}')"

COPY main.py .

EXPOSE 8001

CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8001"]