Dockerfile.backend

# Multi-stage Dockerfile for SolFoundry FastAPI backend.
# Stage 1: Install dependencies into a virtual environment.
# Stage 2: Copy only the venv and app code into a slim runtime image.

# ── Stage 1: Dependencies ────────────────────────────────────────────────────
FROM python:3.11-slim AS dependencies

WORKDIR /build

# System packages required by asyncpg / psycopg2
RUN apt-get update && \
    apt-get install -y --no-install-recommends gcc libpq-dev && \
    rm -rf /var/lib/apt/lists/*

COPY backend/requirements.txt .

RUN python -m venv /opt/venv && \
    /opt/venv/bin/pip install --no-cache-dir --upgrade pip && \
    /opt/venv/bin/pip install --no-cache-dir -r requirements.txt

# ── Stage 2: Runtime ─────────────────────────────────────────────────────────
FROM python:3.11-slim AS runtime

LABEL org.opencontainers.image.source="https://github.com/SolFoundry/solfoundry"
LABEL org.opencontainers.image.description="SolFoundry FastAPI backend"

# libpq is needed at runtime by asyncpg / psycopg2
RUN apt-get update && \
    apt-get install -y --no-install-recommends libpq5 curl && \
    rm -rf /var/lib/apt/lists/*

# Non-root user for security
RUN useradd --create-home --shell /bin/bash solfoundry
USER solfoundry

WORKDIR /home/solfoundry/app

# Copy virtual-env from builder stage
COPY --from=dependencies --chown=solfoundry:solfoundry /opt/venv /opt/venv

# Copy application source
COPY --chown=solfoundry:solfoundry backend/ .

ENV PATH="/opt/venv/bin:$PATH" \
    PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    PYTHONPATH=/home/solfoundry/app

EXPOSE 8000

HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
    CMD curl -f http://localhost:8000/health || exit 1

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