docker-minecraft-server/minecraft-server/start

#!/bin/bash

umask 0002
chmod g+w /data

if [ $(id -u) = 0 ]; then
  if [[ -v UID && $UID != $(id -u) ]]; then
    usermod -u $UID minecraft
  fi
  if [[ -v GID ]]; then
    groupmod -o -g $GID minecraft
  fi

  if [[ $(stat -c "%u" /data) != $UID ]]; then
    echo "Changing ownership of /data to $UID ..."
    chown -R minecraft:minecraft /data
  fi

  exec su-exec minecraft:minecraft /start-configuration $@
else
  exec /start-configuration $@
fi