bash
sudo apt install certbot

bash
certbot certonly --preferred-challenges dns --manual  -d *.xx.cn --server https://acme-v02.api.letsencrypt.org/directory

cert.pem - Apache服务器端证书
chain.pem - Apache根证书和中继证书
fullchain.pem - Nginx所需要ssl_certificate文件
privkey.pem - 安全证书KEY文件

进入docker

docker exec -it <容器id> /bin/bash

nginx -t #查看是否报错

service nginx restart