What if there is no yum in the docker container

  docker, question

Now there is a very small container that provides data services, but there is no yum command in this mirror. What should I do? No other software can be installed

First of all, you need to know what version of mirror you are using.
If it is centos, there must be yum
If it is ubuntu, it is apt-get.
If it is alpine, it is apk