Update userdata-docker.sh

userdata-docker.sh

-#!/bin/bash -lxe
-# source: https://docs.docker.com/engine/install/ubuntu
-# Python 3.6
-# Docker default 5:19.03.15~3-0
-# input DOCKER_VERSION
-#
+#!/bin/bash 
 export LC_ALL=C
 
 ##
 ## Local configuration
 ##
 mkdir $HOME/.docker/
-cat > $HOME/.docker/config.json << EOFLOCAL
+cat > $HOME/.docker/config.json <<EOFLOCAL
 {
     "proxies": {
         "default": {