FROM python:3.12-slim

WORKDIR /app

# Create non-root user
RUN addgroup --system --gid 1001 appgroup && \
    adduser --system --uid 1001 --ingroup appgroup --no-create-home appuser

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

# Copy application source
COPY app/ ./app/

# Data directory (SQLite DB lives here, mounted as a volume)
RUN mkdir -p /data && chown appuser:appgroup /data

USER appuser

EXPOSE 8080

HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
  CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:8080/health')" || exit 1

CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8080", "--proxy-headers", "--forwarded-allow-ips=*"]