Minimal docker image for running Minecraft PE server

• Built on baseimage-docker
• Expects a data volume container mounted at /pocketmine

Example:

## Create a new data volume container for /pocketmine
docker run --name pocketmine_data -v /pocketmine busybox /bin/sh

## Grab latest image, mount data volume, and publish minecraft pe server ports
docker pull akursar/pocketmine
docker run -d -p 19132:19132 -p 19132:19132/udp --volumes-from pocketmine_data akursar/pocketmine