I have several base docker images which are not owned by me (so I cannot modify them). However, I'm creating new images from them with additional things installed.

What I can't figure out is how to tell dockerfile to copy the CMD (or ENTRYPOINT) of the base image. Something like this:

```
FROM other:latest
RUN my-extra-install
CMD <use-the-CMD-from-base-image>

```

I don't think there's any direct syntax for the CMD command to do what I want. I'm wondering if there's a workaround.