updated to include backup infromation

README.md

@@ -195,3 +195,27 @@ docker build -t bitwarden_rs .
 ## Building binary
 
 For building binary outside the Docker environment and running it locally without docker, please see [build instructions](BUILD.md).
+
+## Backup up your vault
+
+1. the sqlite3 database
+
+The sqlite3 database should be backed up using the proper sqlite3 backup command. This will ensure the database does not become corrupted if the backup happens during a database write.
+
+```
+sqlite3 /$DATA_FOLDER/db.sqlite3 ".backup '/$DATA_FOLDER/db-backup/backup.sq3'"
+```
+
+This command can be run via a CRON job everyday, however note that it will overwrite the same backup.sq3 file each time. This backup file should therefore be saved via incremental back either using a CRON job command that appends a timestamp or from another backup app such as Duplicati.
+ 
+2. the key files
+
+By default, these are located in the `$DATA_FOLDER` (by default /data in the docker). There are 3 files: rsa_key.der, rsa_key.pem, rsa_key.pub.der.
+
+3. the attachements folder
+
+By default, this is located in `$DATA_FOLDER/attachments`
+
+4. Icon Cache
+
+This is optional, the icon cache can redownload itself however if you have a large cache, it may take a long time. By default it is located in `$DATA_FOLDER/icon_cache`