FROM python:3.12-slim

WORKDIR /app

RUN apt-get update && apt-get install -y --no-install-recommends \
    gcc \
    default-mysql-client \
    && rm -rf /var/lib/apt/lists/*

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

COPY . .

EXPOSE 8000

# Production default: single worker, proxy-aware, no reload.
# SINGLE WORKER IS A CONSTRAINT, NOT A TUNABLE: processing/export jobs run in-process
# (FastAPI BackgroundTasks) and progress state lives in that process. More workers or
# replicas would split jobs from their status polling. Fine for a ~5-user finance team.
# The dev compose file overrides this command with --reload.
CMD ["uvicorn", "app.api.main:app", "--host", "0.0.0.0", "--port", "8000", \
     "--workers", "1", "--proxy-headers", "--forwarded-allow-ips", "*"]