Docker: Get host IP and add it locally as docker_host_machine so it could be accessible eg. via http://docker_host_machine

docker-host-ip.sh

#!/bin/bash

#
# Get host IP and add it locally as docker_host_machine so it could be accessible eg. via http://docker_host_machine
# ================================
#   Requirements: iproute2
#

cat /etc/hosts | grep -v "docker_host_machine" > /etc/hosts.2 && mv /etc/hosts.2 /etc/hosts
echo "$(ip route show|grep src|awk '{print $9}') docker_host_machine" >> /etc/hosts