docs: add index.md for Self-Hosting section

02-selfhosting/index.md

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+# 🏠 Self-Hosting & Homelab
+
+Guides for running your own services at home, including Docker, reverse proxies, DNS, storage, monitoring, and security.
+
+## Docker & Containers
+
+- [Self-Hosting Starter Guide](docker/self-hosting-starter-guide.md)
+- [Docker vs VMs for the Homelab](docker/docker-vs-vms-homelab.md)
+- [Debugging Broken Docker Containers](docker/debugging-broken-docker-containers.md)
+
+## Reverse Proxies
+
+- [Setting Up Caddy as a Reverse Proxy](reverse-proxy/setting-up-caddy-reverse-proxy.md)
+
+## DNS & Networking
+
+- [Tailscale for Homelab Remote Access](dns-networking/tailscale-homelab-remote-access.md)
+
+## Storage & Backup
+
+- [rsync Backup Patterns](storage-backup/rsync-backup-patterns.md)
+
+## Monitoring
+
+- [Tuning Netdata Web Log Alerts](monitoring/tuning-netdata-web-log-alerts.md)
+
+## Security
+
+- [Linux Server Hardening Checklist](security/linux-server-hardening-checklist.md)