docs(readme): specific docker backup instructions

Backing-up-your-vault.md

@@ -123,4 +123,37 @@ This section contains an index of third-party backup examples. You should review
 * https://gitlab.com/1O/vaultwarden-backup
 * https://github.com/jjlin/vaultwarden-backup
 * https://github.com/jmqm/vaultwarden_backup
-* https://github.com/Guru-25/bitwarden-export
+* https://github.com/Guru-25/bitwarden-export
+
+
+## Docker-Based Automated Backups (Example)
+
+If you're using Vaultwarden via Docker and want to automate your backups to a remote machine, the following method might help. It stops the container to ensure consistency, zips the data directory, transfers it via `scp`, and then restarts Vaultwarden.
+
+**Backup Script Example**:
+
+```bash
+#!/bin/bash
+docker-compose down
+datestamp=$(date +%m-%d-%Y)
+backup_dir="/home/<user>/vw-backups"
+zip -9 -r "${backup_dir}/${datestamp}.zip" /opt/vw-data*
+scp -i ~/.ssh/id_rsa "${backup_dir}/${datestamp}.zip" user@<REMOTE_IP>:~/vw-backups/
+docker-compose up -d
+````
+
+You can automate this via cron:
+
+```bash
+0 0 * * * /root/transfer_vaultwarden_logs.sh
+```
+
+**Cleanup Script (optional)** to keep only the most recent backup:
+
+```bash
+#!/bin/bash
+cd ~/backups || exit
+find . -type f -name '*.zip' ! -mtime -1 -exec rm {} +
+```
+> Always test restores. To restore, unzip the archive back into `/opt/vw-data`, replacing the previous data directory.
+```