root@armbian:~# docker search portainer
Error response from daemon: Get "https://index.docker.io/v1/search?q=portainer&n=25": proxyconnect tcp: dial tcp: lookup host on 192.168.31.1:53: no such host
root@armbian:~# docker pull portainer/portainer-ce
Using default tag: latest
Error response from daemon: Get "https://registry-1.docker.io/v2/": proxyconnect tcp: dial tcp: lookup host on 192.168.31.1:53: no such host
安装docker容器出现这种情况，求指点
