Dockerfile

# HF Spaces requires a non-root user with UID 1000
FROM python:3.11-slim

RUN useradd -m -u 1000 user
USER user
ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH

WORKDIR /app

# Install dependencies before copying source for better layer caching
COPY --chown=user requirements.txt .
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt

# Bake the embedding model into the image so there is no download on cold start
RUN python -c "from sentence_transformers import SentenceTransformer; SentenceTransformer('all-MiniLM-L6-v2')"

# Copy application source (data.json is excluded via .dockerignore)
COPY --chown=user . .

# Seed data.json with the 16 sample documents
RUN python demo.py

# HF Spaces expects the app on port 7860
EXPOSE 7860
ENV PORT=7860

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