add demo and  use  caddy example for laravel

https://github.com/caddyserver/examples/blob/master/laravel/Caddyfile

* 'master' of https://github.com/laradock/laradock:
  update Install Symfony steps in the docs
  Update docker-compose.yml
  Update env-example
  Update Dockerfile-70
  fix rm error

Missing symfony variables in env-example and workspace. Added python as an option to workspace

Added missing symfony and python options to workspace

Added missing symfony install variable and added new python install variable

Add python option to workspace

fix php-worker build error

ERROR INFO:

Step 4/5 : RUN rm -r /var/lib/apt/lists/*
 ---> Running in 4a3aa49e0e6e
rm: can't remove '/var/lib/apt/lists/*': No such file or directory
ERROR: Service 'php-worker' failed to build: The command '/bin/sh -c rm -r /var/lib/apt/lists/*' returned a non-zero code: 1

* 'master' of github.com:laradock/laradock:
  format the readme.md file
  fix travis ci hugo job get "cannot create directory" error.
  fixed #1068
  update some `guide` format in the documentation

fix travis ci hugo job get "cannot create directory" error.

fixed #1068 drush need mysql-client installed

* hackel-change-mysql-version:
  Add documentation on the MYSQL_VERSION variable.
  Allow specifying the version of MySQL to install in .env file.

Merge branch 'change-mysql-version' of https://github.com/hackel/laradock into hackel-change-mysql-version

* 'change-mysql-version' of https://github.com/hackel/laradock:
  Add documentation on the MYSQL_VERSION variable.
  Allow specifying the version of MySQL to install in .env file.

Xdebug configuration for Linux on PhpStorm

Added images and explanations for setting up remote debugging for PhpStorm on Linux

Also modified slightly Install Xdebug section to keep reading consistent

Integrating docker sync

added support for docker-sync and added sync.sh script to simplify the use of docker-sync with laradock