帮我看看我用的aws云，为什么会有下面这个错误

[+] Building 2.2s (12/24)                                                                               
 => [trojan-docker_trojan internal] load .dockerignore                                             0.0s
 => => transferring context: 2B                                                                    0.0s
 => [trojan-docker_nginx internal] load build definition from Dockerfile                           0.1s
 => => transferring dockerfile: 675B                                                               0.0s
 => [trojan-docker_nginx internal] load .dockerignore                                              0.0s
 => => transferring context: 2B                                                                    0.0s
 => [trojan-docker_trojan internal] load build definition from Dockerfile                          0.1s
 => => transferring dockerfile: 585B                                                               0.0s
 => [trojan-docker_trojan internal] load metadata for docker.io/library/centos:7                   1.4s
 => [trojan-docker_nginx internal] load metadata for docker.io/library/nginx:mainline              1.3s
 => CACHED [trojan-docker_nginx 1/8] FROM docker.io/library/nginx:mainline@sha256:08bc36ad52474e5  0.0s
 => [trojan-docker_nginx internal] load build context                                              0.1s
 => => transferring context: 264B                                                                  0.0s
 => ERROR [trojan-docker_nginx 2/8] RUN sed -i s@/deb.debian.org/@/mirrors.aliyun.com/@g /etc/apt  0.6s
 => CACHED [trojan-docker_trojan 1/8] FROM docker.io/library/centos:7@sha256:be65f488b7764ad3638f  0.0s
 => [trojan-docker_trojan internal] load build context                                             0.0s
 => => transferring context: 121B                                                                  0.0s
 => CANCELED [trojan-docker_trojan 2/8] RUN yum update -y &&     yum install -y epel-release gnut  0.7s
------
 > [trojan-docker_nginx 2/8] RUN sed -i s@/deb.debian.org/@/mirrors.aliyun.com/@g /etc/apt/sources.list:
#8 0.547 sed: can't read /etc/apt/sources.list: No such file or directory
------
failed to solve: rpc error: code = Unknown desc = process "/bin/sh -c sed -i s@/deb.debian.org/@/mirrors.aliyun.com/@g /etc/apt/sources.list" did not complete successfully: exit code: 2
finish .

本机 /etc/apt/sources.list这里文件里面并没有什么阿里云相关的源。

移除了Nginx下面Dockerfile的写入阿里云镜像的命令后可以正常安装了。

你自己改了 dockerfile 吧？ 在 centos 怎么跑得了 ubuntu 命令