# ── builder ──────────────────────────────────────────────────────────────────
FROM python:3.12-slim AS builder

WORKDIR /build

# Install shared + service deps in one layer
COPY services/auth/requirements.txt ./requirements.txt
RUN pip install --upgrade pip && \
    pip install --no-cache-dir --prefix=/install -r requirements.txt

# ── runtime ──────────────────────────────────────────────────────────────────
FROM python:3.12-slim AS runtime

RUN addgroup --system appgroup && adduser --system --ingroup appgroup appuser

WORKDIR /app

COPY --from=builder /install /usr/local

# Copy shared module (available to all services)
COPY shared/ shared/

# Copy service source
COPY services/auth/app/ app/

RUN chown -R appuser:appgroup /app

USER appuser

EXPOSE 8000

CMD ["gunicorn", "app.main:app", \
     "-k", "uvicorn.workers.UvicornWorker", \
     "--bind", "0.0.0.0:8000", \
     "--workers", "2", \
     "--timeout", "30"]