Add phpstorm documentation with Docker and MacOS

doc/phpstorm-macosx.md

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+# Configure PHPStorm with MacOS
+
+Inspired from this following links :
+
+- [Running PHPUnit Tests in PhpStorm with Docker](https://www.youtube.com/watch?v=I7aGWO6K3Ho)
+- [All hail Xdebug and lets let var dump die](http://jamescowie.me/blog/2016/12/all-hail-xdebug-and-lets-let-var-dump-die/)
+
+## Edit PHP configuration
+
+![PHP CLI Interpreter](images/ps-mac-php-interpreter.png)
+
+## Add a PHP interpreter
+
+![Add PHP CLI Interpreter](images/ps-mac-php-cli-add-interpreter.png)
+
+## Configure PHPUnit
+
+![PHPUnit](images/ps-mac-php-phpunit.png)
+
+### Add test configuration
+
+![PHPUnit Config](images/ps-mac-php-phpunit-config.png)
+
+### PHPUnit Demo
+
+![PHPUnit Demo](images/ps-mac-php-phpunit-demo.png)
+
+## Configure XDebug
+
+### Edit `etc/php.ini` file
+
+Add this following lines :
+
+```sh
+[xdebug]
+xdebug.remote_host = 10.254.254.254
+xdebug.remote_port = 9000
+xdebug.remote_autostart=1
+xdebug.idekey = PHPSTORM
+xdebug.remote_enable = 1
+xdebug.remote_connect_back = 0
+xdebug.profiler_enable = 1
+```
+
+### Check Debug section
+
+![Xdebug](images/ps-mac-php-xdebug.png)
+
+### Add a debug server
+
+![XDebug Server](images/ps-mac-php-xdebug-server.png)
+
+### Configure XDebug Proxy
+
+Create an IP Alias :
+
+```sh
+sudo ifconfig en0 alias 10.254.254.254 255.255.255.0
+```
+
+![Xdebug Proxy](images/ps-mac-php-xdebug-proxy.png)
+
+To delete an IP Alias : 
+
+```sh
+sudo ifconfig en0 -alias 10.254.254.254
+```
+
+### XDebug Demo
+
+![XDebug Demo](images/ps-mac-php-xdebug-demo.png)