FROM python:3.14-slim

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1

WORKDIR /app

COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

COPY app ./app

# Non-root user; the SQLite database lives on the /data volume
RUN useradd --create-home gateway && mkdir /data && chown gateway:gateway /data
USER gateway

ENV GATEWAY_DATABASE_URL=sqlite:////data/gateway.db

EXPOSE 8000

HEALTHCHECK --interval=30s --timeout=3s --start-period=10s --retries=3 \
  CMD python -c "import urllib.request; urllib.request.urlopen('http://127.0.0.1:8000/health', timeout=2)"

# Single worker on purpose: the rate limiter and sync cache are in-memory.
CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]