Updates the xdebug hostname to "dockerhost", which is set to the host system's IP. This one actually requires "docker-compose restart", the service restart isn't enough.

update-xdebug-hostname.sh

#!/bin/bash

# To be run from inside the docker container. This script updates PHP settings to use the 'dockerhost' hostname
# rather than auto-discovery.
# The dockerhost hostname only works when your host machine has it's IP address in a variable called DOCKERHOST

# Fix host settings for web-based xdebug
sudo sed -i '/remote_connect_back/d' /etc/php/fpm-pool/drupal-xdebug.conf
sudo echo 'php_flag[xdebug.remote_connect_back] = off' >> /etc/php/fpm-pool/drupal-xdebug.conf
sudo echo 'php_admin_value[xdebug.remote_host] = "dockerhost"' >> /etc/php/fpm-pool/drupal-xdebug.conf
sudo service php7.0-fpm restart
echo "xdebug settings updated, php restarted."