Multiple Instances on QNAP

[chip]

Hi,
I have used Container Station to Export my minimserver docker container to a .tar file.
I then used Container Station Import to create a new minimserver docker container with the additional shared folder mounted.
I now have my music library folder mounted and another folder (dockershare) mounted that contains ffmpeg.
I have been searching for the way to copy the ffmpeg file to /opt/minimserver/opt/bin in the minimserver docker container without success.
I can see the minimserver console and another option for Terminal.
I can see the commands available in the Console and do not see anything that looks like it will copy files.

When I click Terminal I see a command line dialog.
Do I use terminal to enter the copy command?
I have not figured out how to get a list of Terminal commands.
If I should use terminal can you point me toward the commands that are available?

Or should I use something else to access the minimserver docker container to copy files?

Chip