Add full NAS service catalog for disaster recovery.

Compose files and configs for postgres, adguard, duckdns, homarr, neo4j,
portainer, remotely, and monitoring; RESTORE.md and sync-from-nas script.
Sanitize pgAdmin secrets; document homelab-command as separate repo.

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

.gitignore

@@ -2,6 +2,9 @@
 .DS_Store
 Thumbs.db
 *.bak
+.env
+.env.*
+!.env.example
 
 # Runtime data (niet in git)
 *.db