title: Disk size of a docker image
body: <p>As someone new to docker world and coming from a virtual machine mindset. I downloaded a docker image for elastic search from docker hub.I am thinking about any configurations I need to do because a lot of data will be forwarded to this image.  I need to be considerate about the available disk space. In a Virtual machine world, I can always add additional vhds to increase disk size etc. What's similar operation in a docker world?</p>