Add PHPStorm PHPStan set up guide (#37)

Author: rdss-sknott

doc/ideConfig/IdeConfig.md

@@ -11,6 +11,7 @@ The Coding-Standard incorporates different tools to check and fix your code.
 Here are the guides to set up PHPStorm for each tool:
 
 - [PHP Code Sniffer](phpCS/PhpCodeSniffer.md)
+- [PHP Stan](phpStan/PhpStan.md)
 
 
 

doc/ideConfig/phpCS/PhpCodeSniffer.md

@@ -5,7 +5,7 @@ able to see code highlighting and use auto-fixing in your IDE.
 
 How long will it take: 15 minutes
 
-Pre-requisites:
+## Pre-requisites
 - Completed guide: [PHP-Interpreter](../phpInterpreter/PhpInterpreter.md)
 - A local composer project, fully installed
 

doc/ideConfig/phpCS/php-code-sniffer-configuration-docker.png

@@ -0,0 +1,41 @@
+# Set up PHPStorm for PHPStan
+
+This guide will help you set up PHPStorm to use PHPStan. You will be
+able to see code highlighting and use auto-fixing in your IDE.
+
+How long will it take: 15 minutes
+
+## Pre-requisites
+- Completed guide: [PHP-Interpreter-Guide](../phpInterpreter/PhpInterpreter.md)
+- A local composer project, fully installed
+
+## Steps
+
+1) Open the PHPStorm IDE and load up the project you want to work on.
+2) Open the settings dialog by pressing `Ctrl + Alt + S`(Windows + Linux)
+   `CMD + ,` (macOS).
+3) Navigate to "PHP" -> "Quality Tools" -> "PHPStan" and open the
+   Configuration by clicking on the "..." button.
+   ![PHPStan](php-stan.png)
+4) If your [PHP interpreter](#Set-up-the-PHP-interpreter) we set up in [PHP-Interpreter-Guide](../phpInterpreter/PhpInterpreter.md)
+   is not automatically added to the list click on the "+" button to add it
+   now.
+5) Fill the Dialog as follows
+    * `PHPStan path` must be `/coding-standard/vendor/bin/phpstan`
+
+   ![PHPStan Configuration](php-stan-configuration.png)
+6) Click on the Folder Icon in `Docker container` and change the Volume bindings
+   as follows. The only entry allowed here is Hostpath = absolute Path to your
+   project ->  Container path = /app
+
+   ![PHPStan Configuration](php-stan-configuration-docker.png)
+7) Return to "PHP" -> "Quality Tools" -> "PHPStan".
+8) Choose your newly added configuration and Switch it on.
+9) Now we have to set the options. Please make very sure that you don't miss anything.
+   * Check Full project run
+   * Set `Level` to `5`
+   * Set `Configuration file` to `/coding-standard/config/phpstan/phpstan.neon`
+   * Set `Autoload file` to `/app/vendor/autoload.php`
+
+   ![PHPStan Options](php-stan.png)
+10) Close dialog. You are done.