Change cli debugging instructions

[froboy]

In attempting to configure Xdebug with PHPStorm to debug with Drush I found that the existing instructions didn't correctly set the PHP_IDE_CONFIG variable, I think because VIRTUAL_HOST is in a different context than docksal-local.env so it's not able to be referenced.

Using the old instructions, this is what I get after fin up:

❯ fin exec printenv PHP_IDE_CONFIG
serverName=

My project is using the default VIRTUAL_HOST (as I'd imagine many are) and not setting it in docksal.env. After setting PHP_IDE_CONFIG in docksal.yml:

❯ fin exec printenv PHP_IDE_CONFIG
serverName=my-project.docksal

[froboy]

Removed quotes as per https://stackoverflow.com/a/50176116/2566038.

[sean-e-dietrich]

@froboy the documentation currently seems valid without the changes.

The PHP_IDE_CONFIG variable is currently present in the cli config https://github.com/docksal/docksal/blob/develop/stacks/services.yml#L148

I'm wondering if the wondering may need to be just changed a little bit to make it a little more apparent that you would need to add a PHP_IDE_CONFIG to debug cli