title: Is it possible to mount a volume on the host during BUILD phase of a docker image?
body: <p>I'm using centos:6 and need to build an image -using Dockerfile- which has a number of rpms installed (Oracle client, in fact). I don't want to copy/add the rpms inside the image, as it will make the image bulky (and I have to remove the rpms after install, anyway).</p>
  
  <p>Is there a way to mount a folder on the host (CentOS, itself) which contains the rpms, on the image, via Dockerfile and/or using any option of "docker build" command, during the BUILD phase?</p>