Initial homelab docs

Co-authored-by: Cursor <cursoragent@cursor.com>

homelab/vpn-route-check/Dockerfile

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+FROM python:3.11-slim
+RUN apt-get update && apt-get install -y --no-install-recommends traceroute dnsutils iproute2 openssh-client && rm -rf /var/lib/apt/lists/*
+WORKDIR /app
+COPY check_routes.py domains.txt serve_no_cache.py ./
+RUN mkdir -p /data
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+EXPOSE 8765
+ENTRYPOINT ["/entrypoint.sh"]