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>

.env.example

@@ -0,0 +1,18 @@
+# Globale referentie — per service staat een eigen .env.example in docker/<service>/
+
+NAS_IP=192.168.1.211
+POSTGRES_USER=mo
+POSTGRES_PASSWORD=changeme
+POSTGRES_DB=homelab
+PG_HOST_PORT=5433
+
+GRAFANA_ADMIN_USER=admin
+GRAFANA_ADMIN_PASSWORD=changeme_grafana
+GRAFANA_ROOT_URL=http://192.168.1.211:3002
+
+PGADMIN_PASSWORD=changeme
+PGADMIN_EMAIL=mo@el-kadi.nl
+
+NEO4J_AUTH=neo4j/changeme
+DUCKDNS_SUBDOMAINS=mohome020
+DUCKDNS_TOKEN=your-token