solo 迁移后 nginx 502

原来的 VPS 到期了，换了一家，近期在做迁移时，nginx 代理出现 502,很奇怪，配置文件和脚本都是一样的，域名切回到原来的 IP 就好使，新的 IP，solo 不行，通过 IP 直接访问页面是乱的。

solo 的启动脚本：

docker pull b3log/solo
docker stop solo
docker rm solo
docker run --detach --name solo --network=host \
    --env RUNTIME_DB="MYSQL" \
    --env JDBC_USERNAME="root" \
    --env JDBC_PASSWORD="123456789" \
    --env JDBC_DRIVER="com.mysql.cj.jdbc.Driver" \
    --env JDBC_URL="jdbc:mysql://127.0.0.1:3306/solo?useUnicode=yes&characterEncoding=UTF-8&useSSL=false&serverTimezone=UTC" \
    b3log/solo --listen_port=8080 --server_scheme=https --server_host=www.xiaoyver.top

solo 日志：

[INFO ]-[2020-10-21 11:03:41]-[org.b3log.solo.Server:253]: Solo is booting [ver=4.3.1, os=Linux, isDocker=true, inJar=false, luteAvailable=false, pid=1, runtimeDatabase=MYSQL, runtimeMode=PRODUCTION, jdbc.username=root, jdbc.URL=jdbc:mysql://127.0.0.1:3306/solo?useUnicode=yes&characterEncoding=UTF-8&useSSL=false&serverTimezone=UTC]
[INFO ]-[2020-10-21 11:03:42]-[org.b3log.solo.util.Skins:70]: Loaded template from directory [/opt/solo/]
[INFO ]-[2020-10-21 11:03:43]-[org.b3log.solo.Server:300]: Solo is running
[INFO ]-[2020-10-21 11:03:57]-[org.b3log.solo.service.ExportService:338]: Backup all articles to HacPai....
[INFO ]-[2020-10-21 11:04:00]-[org.b3log.solo.service.ExportService:394]: Backup all articles to HacPai completed: {"msg":"","code":0}
[INFO ]-[2020-10-21 11:04:00]-[org.b3log.solo.service.ExportService:271]: Backup public articles to your GitHub repo [solo-blog]....
[INFO ]-[2020-10-21 11:04:08]-[org.b3log.solo.service.ExportService:317]: Exported public articles to your repo [solo-blog]

nginx 的配置文件：/etc/nginx/conf.d/default.conf

upstream backend {
    server localhost:8080; # Tomcat/Jetty  原有的监听
}

server {
    listen       80;
    server_name  xiaoyver.top www.xiaoyver.top;

    access_log off;

        return 301 https://$server_name$request_uri;  # 监听80端口，并将server_name全部转发
}

server {
    listen       443	ssl;  # 修改监听接口
    server_name  xiaoyver.top www.xiaoyver.top;
    charset utf8; # 修改默认字符
    # ssl on;  # 开启ssl

    # 很重要！！！设定你的ssl证书
    ssl_certificate /etc/nginx/conf.d/1_www.xiaoyver.top_bundle.crt;
    ssl_certificate_key /etc/nginx/conf.d/2_www.xiaoyver.top.key;

    # 重要！ 原有的接口代理可以不用修改，在内部使用http
    location / {
        proxy_pass http://backend$request_uri;
        proxy_set_header  Host $host:$server_port;
        proxy_set_header  X-Real-IP  $remote_addr;
        client_max_body_size  10m;
    }

    location /jianli {

        root   /usr/share/nginx/html;    #指定容器中的路径
        index  index.html index.htm;
    }

    location /daojishi {

        root   /usr/share/nginx/html;    #指定容器中的路径
        index  index.html index.htm;
    }
}

nginx 日志：

42.48.60.146 - - [21/Oct/2020:11:34:05 +0800] "GET / HTTP/1.1" 502 559 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.80 Safari/537.36 Edg/86.0.622.43" "-"
42.48.60.146 - - [21/Oct/2020:11:34:05 +0800] "GET /favicon.ico HTTP/1.1" 502 559 "https://www.xiaoyver.top/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.80 Safari/537.36 Edg/86.0.622.43" "-"
42.48.60.146 - - [21/Oct/2020:11:34:05 +0800] "GET / HTTP/1.1" 502 559 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.80 Safari/537.36 Edg/86.0.622.43" "-"
42.48.60.146 - - [21/Oct/2020:11:34:05 +0800] "GET /favicon.ico HTTP/1.1" 502 559 "https://www.xiaoyver.top/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.80 Safari/537.36 Edg/86.0.622.43" "-"