docker ngnix容器代理本地服务：*1 connect() failed (111: Connection refused) while connecting to upstream

http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    #gzip  on;

    include /etc/nginx/conf.d/*.conf;

    server {
        listen       443 ssl;

        server_name  efuser.test.top;

        ssl_certificate /ssl/grr_ssl/Nginx/1_www.test.top_bundle.crt;
        ssl_certificate_key /ssl/grr_ssl/Nginx/2_www.test.top.key;

        ssl_session_timeout 5m;
        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
        ssl_ciphers ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP;
        ssl_prefer_server_ciphers on;

        location /  {
                    root /usr/share/nginx/html;
                    index index.html;
                    
        }
        location ^~/api/  {
                  proxy_pass http://127.0.0.1:3001/;          
                  proxy_redirect off;
                  proxy_set_header Host $host;
                  proxy_set_header X-Real-IP $remote_addr;
                  proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }

    } 
}

重启docker ,nignx日志一直报错：

2020/10/21 06:49:55 [error] 21#21: *4 connect() failed (111: Connection refused) while connecting to upstream, client: 172.17.0.1, server: efuser.guorongrong.top, request: "GET /api/ HTTP/1.1", upstream: "http://127.0.0.1:3001/", host: ...

解决方案1：127.0.0.1指向的是 172.17.0.1 这个容器他 本身，指向的并不是服务器地址；proxy_pass http://127.0.0.1:3001/; 改成proxy_pass http://192.168.9.97:3001/; 解决问题。
解决方案2：--network host桥接模式

docker run \
  -p 80:80 \
  -p 443:443 \
  --name nginx-web \
  --network host \
  -v /home/nginx/www:/usr/share/nginx/html \
  -v /home/nginx/conf/nginx.conf:/etc/nginx/nginx.conf \
  -v /home/nginx/logs:/var/log/nginx \
  -v /mnt/data:/mnt/data \
  -v /home/nginx/ssl:/ssl/ \
  -d nginx