大家好，
我正在尝试在我的 docker pulsar（我在我的 docker 容器中提取 pulsar 映像）容器中安装 vim，我的 windows 机器中有 docker。我使用了两个命令两个命令都失败了.....
第一个：apt-get 更新
Err:1 http://security.debian.org/debian-security stretch/updates InRelease
Could not resolve 'security.debian.org'
Err:2 http://deb.debian.org/debian stretch InRelease
Could not resolve 'deb.debian.org'
Err:3 http://deb.debian.org/debian stretch-updates InRelease
Could not resolve 'deb.debian.org'
Reading package lists... Done
W: Failed to fetch http://deb.debian.org/debian/dists/stretch/InRelease
Could not resolve 'deb.debian.org'
W: Failed to fetch http://deb.debian.org/debian/dists/stretch-
updates/InRelease Could not resolve 'deb.debian.org'
W: Failed to fetch http://security.debian.org/debian-
security/dists/stretch/updates/InRelease Could not resolve '
'security.debian.org'
W: Some index files failed to download. They have been ignored, or old ones
used instead.
第二：apt-get install vim
libgpm2 vim vim-common vim-runtime xxd
0 upgraded, 5 newly installed, 0 to remove and 10 not upgraded.
Need to get 6766 kB of archives.
After this operation, 31.2 MB of additional disk space will be used.
Do you want to continue? [Y/n] Y
Err:1 http://deb.debian.org/debian stretch/main amd64 xxd amd64 2:8.0.0197-
4+deb9u1
Could not resolve 'deb.debian.org'
Err:2 http://deb.debian.org/debian stretch/main amd64 vim-common all
2:8.0.0197-4+deb9u1
Could not resolve 'deb.debian.org'
Err:3 http://deb.debian.org/debian stretch/main amd64 libgpm2 amd64 1.20.4-
6.2+b1
Could not resolve 'deb.debian.org'
Err:4 http://deb.debian.org/debian stretch/main amd64 vim-runtime all
2:8.0.0197-4+deb9u1
Could not resolve 'deb.debian.org'
Err:5 http://deb.debian.org/debian stretch/main amd64 vim amd64 2:8.0.0197-
4+deb9u1
Could not resolve 'deb.debian.org'
E: Failed to fetch
http://deb.debian.org/debian/pool/main/v/vim/xxd_8.0.0197-4+deb9u1_amd64.deb
Could not resolve 'deb.debian.org'
E: Failed to fetch http://deb.debian.org/debian/pool/main/v/vim/vim-
common_8.0.0197-4+deb9u1_all.deb Could not resolve 'deb.debian.org'
E: Failed to fetch
http://deb.debian.org/debian/pool/main/g/gpm/libgpm2_1.20.4-6.2+b1_amd64.deb
Could not resolve 'deb.debian.org'
E: Failed to fetch http://deb.debian.org/debian/pool/main/v/vim/vim-
runtime_8.0.0197-4+deb9u1_all.deb Could not resolve 'deb.debian.org'
E: Failed to fetch
http://deb.debian.org/debian/pool/main/v/vim/vim_8.0.0197-4+deb9u1_amd64.deb
Could not resolve 'deb.debian.org'
E: Unable to fetch some archives, maybe run apt-get update or try with --
fix-missing?
我也附上屏幕截图。会是什么原因？