Dockerfile

# ---------------------------------------------------------------------------
# Stage 1: Build — install dependencies into a virtual environment
# ---------------------------------------------------------------------------
FROM python:3.12-slim AS builder

WORKDIR /app

# Install build tools
RUN pip install --upgrade pip setuptools wheel

COPY pyproject.toml ./
COPY src/ ./src/

# Install runtime dependencies only (no dev extras)
RUN pip install --no-cache-dir .

# ---------------------------------------------------------------------------
# Stage 2: Runtime — minimal final image
# ---------------------------------------------------------------------------
FROM python:3.12-slim AS runtime

# Create a non-root user for security
RUN useradd --create-home --shell /bin/bash appuser

WORKDIR /app

# Copy installed packages and application code from builder
COPY --from=builder /usr/local/lib/python3.12/site-packages /usr/local/lib/python3.12/site-packages
COPY --from=builder /usr/local/bin/uvicorn /usr/local/bin/uvicorn
COPY --from=builder /app/src ./src

# The SQLite database file will be stored in a named volume
VOLUME ["/app/data"]

# Override the database path via environment variable
ENV DATABASE_URL="sqlite+aiosqlite:///./data/energy_assets.db"

USER appuser

EXPOSE 8000

HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
    CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:8000/health')"

CMD ["uvicorn", "src.main:app", "--host", "0.0.0.0", "--port", "8000", "--workers", "1"]