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

Dockerfile.indexer

@@ -0,0 +1,32 @@
+# Indexer-only Dockerfile (lightweight, no API dependencies)
+FROM python:3.11-slim
+
+WORKDIR /app
+
+# Install dependencies
+RUN apt-get update && apt-get install -y \
+    build-essential \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install Python dependencies
+RUN pip install --no-cache-dir \
+    pydantic lancedb pyarrow requests watchdog typer rich numpy httpx
+
+# Copy application code
+COPY companion/ ./companion/
+COPY companion/indexer_daemon/ ./companion/indexer_daemon/
+COPY companion/rag/ ./companion/rag/
+
+# Create directories for data
+RUN mkdir -p /data/vectors
+
+# 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
+
+# Default command (can be overridden)
+CMD ["python", "-m", "companion.indexer_daemon.cli", "index"]