buildah copy - Copies the contents of a file, URL, or directory into a container's working directory.
buildah copy containerID SRC [[...] DEST]
Copies the contents of a file, URL, or a directory to a container's working directory or a specified location in the container. If a local directory is specified as a source, its contents are copied to the destination.
--chown owner:group
Sets the user and group ownership of the destination content.
buildah copy containerID '/myapp/app.conf' '/myapp/app.conf'
buildah copy --chown myuser:mygroup containerID '/myapp/app.conf' '/myapp/app.conf'
buildah copy containerID '/home/myuser/myproject.go'
buildah copy containerID '/home/myuser/myfiles.tar' '/tmp'
buildah copy containerID '/tmp/workingdir' '/tmp/workingdir'
buildah copy containerID 'https://github.com/projectatomic/buildah' '/tmp'
buildah copy containerID 'passwd' 'certs.d' /etc
buildah(1)