feat: Phase 6 - Docker, systemd, and installation scripts

Dockerfile

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+# Build stage
+FROM python:3.11-slim AS builder
+
+WORKDIR /app
+
+# Install build dependencies
+RUN apt-get update && apt-get install -y \
+    build-essential \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install Python dependencies
+COPY pyproject.toml .
+RUN pip install --no-cache-dir -e ".[dev]" \
+    && pip wheel --no-cache-dir --wheel-dir /app/wheels \
+    pydantic lancedb pyarrow requests watchdog typer rich numpy httpx sse-starlette fastapi uvicorn
+
+# Production stage
+FROM python:3.11-slim AS production
+
+WORKDIR /app
+
+# Install runtime dependencies
+RUN apt-get update && apt-get install -y \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy wheels and install
+COPY --from=builder /app/wheels /wheels
+RUN pip install --no-cache-dir /wheels/*
+
+# Copy application code
+COPY companion/ ./companion/
+COPY companion/forge/ ./companion/forge/
+COPY companion/indexer_daemon/ ./companion/indexer_daemon/
+COPY companion/rag/ ./companion/rag/
+
+# Create directories for data
+RUN mkdir -p /data/vectors /data/memory /models
+
+# Copy default config
+COPY config.json /app/config.json
+
+# Environment variables
+ENV PYTHONPATH=/app
+ENV COMPANION_CONFIG=/app/config.json
+ENV COMPANION_DATA_DIR=/data
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+    CMD python -c "import requests; requests.get('http://localhost:7373/health')" || exit 1
+
+# API port
+EXPOSE 7373
+
+# Default command
+CMD ["python", "-m", "uvicorn", "companion.api:app", "--host", "0.0.0.0", "--port", "7373"]