Update README.md

README.md

@@ -80,6 +80,9 @@ mig: copy /docker_data out, commit and push docker(nothing may changed).
 ```
 docker commit rweb 600163736385.dkr.ecr.us-west-2.amazonaws.com/mail.recolic.net
 docker push 600163736385.dkr.ecr.us-west-2.amazonaws.com/mail.recolic.net
+
+rsync -avz /var/lib/mysql $newServerIp:/docker_data/mysql
+rsync -avz /var/vmail $newServerIp:/docker_data/vmail
 ```
 
 passwd: