请问我在docker中的melodic版本中安装vim显示这个错误我该怎么办

[2205717020]

root@7a769716b525:/home/zhy/opt/melodic# apt install  vim
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package vim

[小鱼]

@2205717020 先update