Fix selfupdate

setup/scripts/setup

-#!/bin/bash
+#!/bin/sh
 
 cp /usr/local/bin/l3d /setup/l3d
 cp /usr/local/bin/prepareMac4L3d /setup/prepareMac4L3d
-if [[ -z ${NEWVERSION} ]]; then
+if [ "${NEWVERSION}" = "" ]; then
   docker pull registry.lakedrops.com/docker/l3d/run:${NEWVERSION} 2>&1
 else
   docker pull registry.lakedrops.com/docker/l3d/run:latest 2>&1