Docker & Drupal Local Alias via seperate dockerized SSH Container

docker.aliases.drushrc.php

$aliases['loc'] = array (
  // This is the full site alias name from which we inherit its config.
  'parent' => '@docker.loc' //alias name,
  'uri' => 'docker.loc' //Drupal URL,
  'root' => '/var/www/' //Drupal full path on disk,
  'ssh-options'  => '-p 2222',
  'remote-host' => '192.168.99.100' //DOCKER/DOCKER MACHINE IP,
);

docker_ssh.sh

#Create an ssh container
#https://github.com/jeroenpeeters/docker-ssh
#$1 is the container name
#$2 is the port number e.g. 2222
#
# Run example: ./docker_ssh.sh drupal-docker 2222
#
SSHContainer="sshd-$1"
docker run -e CONTAINER=$1 -e AUTH_MECHANISM=noAuth \
  --name $SSHContainer -p $2:22  --rm \
  -v /var/run/docker.sock:/var/run/docker.sock \
  jeroenpeeters/docker-ssh

Creates a dockerized ssh into your drupal container. Put the config file with appropriate parameters in your ~/.drush folder

access via drush alias e.g.
drush @docker.loc status