用脚本监控caddy获取的新证书，并复制到指定文件夹，重启目标maicow docker应用证书。

#!/bin/bash
MAILCOW_HOSTNAME=mail.xxx.com
CADDY_CERTS_DIR=/var/lib/caddy/.local/share/caddy/certificates/acme-v02.api.letsencrypt.org-directory
MD5SUM_CURRENT_CERT=($(md5sum /opt/mailcow-dockerized/data/assets/ssl/cert.pem))
MD5SUM_NEW_CERT=($(md5sum $CADDY_CERTS_DIR/$MAILCOW_HOSTNAME/$MAILCOW_HOSTNAME.crt))

if [ $MD5SUM_CURRENT_CERT != $MD5SUM_NEW_CERT ]; then
        cp $CADDY_CERTS_DIR/$MAILCOW_HOSTNAME/$MAILCOW_HOSTNAME.crt /opt/mailcow-dockerized/data/assets/ssl/cert.pem
        cp $CADDY_CERTS_DIR/$MAILCOW_HOSTNAME/$MAILCOW_HOSTNAME.key /opt/mailcow-dockerized/data/assets/ssl/key.pem
        cp $CADDY_CERTS_DIR/$MAILCOW_HOSTNAME/$MAILCOW_HOSTNAME.crt /opt/mailcow-dockerized/data/assets/ssl/$MAILCOW_HOSTNAME/cert.pem
        cp $CADDY_CERTS_DIR/$MAILCOW_HOSTNAME/$MAILCOW_HOSTNAME.key /opt/mailcow-dockerized/data/assets/ssl/$MAILCOW_HOSTNAME/key.pem
        postfix_c=$(docker ps -qaf name=postfix-mailcow)
        dovecot_c=$(docker ps -qaf name=dovecot-mailcow)
        nginx_c=$(docker ps -qaf name=nginx-mailcow)
        docker restart ${postfix_c} ${dovecot_c} ${nginx_c}

else
        echo "Certs not copied from Caddy (Not needed)"
fi