Copy a file to a Docker container just before star

Question

I know that you can copy a file from host to a running Docker container using docker cp, but in my case I want to copy it just before starting the docker container. How can I do that?

Note that I don't want this file in my built docker image, so I cannot copy it at build time even. Another way is to use mounted volumes (with -v), but I don't want that either.

Answer 1

you can do something like this:

docker create mycon
docker cp /myfiles/file mycon:/path/file
docker start mycon