docs: 增加容器部署文档

docker/conf/nginx/conf.d/chatgpt-plus.conf

@@ -35,7 +35,7 @@ server {
                 proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                 proxy_set_header Upgrade $http_upgrade;
                 proxy_set_header Connection $connection_upgrade;
-                proxy_pass http://192.168.3.200:6789; # 这里改成后端服务的内网 IP 地址
+                proxy_pass http://172.28.173.76:6789; # 这里改成后端服务的内网 IP 地址
         }
     }