docs: add full homelab documentation structure

docs/operations/DOCKERSTACK_STORAGE_NOTES.md

@@ -0,0 +1,61 @@
+# Dockerstack Storage Notes
+
+## Local SSD
+Use `/docker/...` for:
+- Docker root (`/docker/docker-data`)
+- GPU/model storage
+- SQLite-backed apps
+- Apps that chown on startup
+- Write-heavy DB/search storage
+
+Examples:
+- `/mnt/docker-ssd/docker/docker-data`
+- `/mnt/docker-ssd/docker/appdata/ollama`
+- `/mnt/docker-ssd/docker/appdata/openwebui`
+- `/mnt/docker-ssd/docker/appdata/immich`
+- `/mnt/docker-ssd/docker/appdata/immich-ml`
+- `/mnt/docker-ssd/docker/appdata/plex`
+- `/mnt/docker-ssd/docker/appdata/tautulli`
+- `/mnt/docker-ssd/docker/appdata/audiobookshelf`
+- `/mnt/docker-ssd/docker/appdata/seerr`
+- `/mnt/docker-ssd/docker/appdata/dockhand`
+- `/mnt/docker-ssd/docker/appdata/rackpeek`
+- `/mnt/docker-ssd/docker/appdata/shlink`
+- `/mnt/docker-ssd/docker/appdata/gitea`
+- `/mnt/docker-ssd/docker/appdata/netdata`
+- `/mnt/docker-ssd/docker/appdata/tailscale`
+- `/mnt/docker-ssd/docker/appdata/uptime-kuma`
+- `/mnt/docker-ssd/docker/databases/postgres`
+- `/mnt/docker-ssd/docker/databases/mariadb`
+- `/mnt/docker-ssd/docker/databases/redis`
+
+## TrueNAS NFS
+Use `/mnt/tank/docker/...` for:
+- Normal appdata
+- Uploads
+- Non-fussy config and data
+- Backups
+- Downloads
+
+Examples:
+- `/mnt/tank/docker/appdata/homepage`
+- `/mnt/tank/docker/appdata/newt`
+- `/mnt/tank/docker/appdata/kitchenowl`
+- `/mnt/tank/docker/appdata/donetick`
+- `/mnt/tank/docker/appdata/qui`
+- `/mnt/tank/docker/appdata/calibre-web-automated`
+- `/mnt/tank/docker/backups`
+- `/mnt/tank/docker/downloads`
+
+## Unraid NFS
+Use `/mnt/unraid/...` for media and shared bulk content only:
+- `/mnt/unraid/data/media/` — Plex libraries, books, etc.
+- `/mnt/unraid/immich` — Immich photo/video storage
+
+## Rules Learned
+- SQLite apps and apps that write logs aggressively should prefer local SSD.
+- Database/search/model-heavy workloads should prefer local SSD.
+- General config and less write-sensitive appdata can live on TrueNAS NFS.
+- Media should stay on Unraid mounts.
+- SQLite on ZFS with nfsv4 ACLs will always fail — move to SSD or use Postgres.
+- Apps with auto-upgrade features that use bind mounts: pre-create all source directories manually on TrueNAS to prevent Docker from trying to create them at the read-only root.