FROM python:3.12-slim

# HuggingFace Docker Spaces run as UID 1000 by default. Prep home + workdir.
RUN useradd -m -u 1000 user
USER user
ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH \
    PYTHONUNBUFFERED=1

WORKDIR $HOME/app

# Install deps first (better layer caching).
COPY --chown=user requirements.txt .
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt

# App code.
COPY --chown=user . .

# Port that HF Spaces expects (matches app_port in README frontmatter).
EXPOSE 7860

# Single-process uvicorn: no port collisions.
CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]