Merge remote-tracking branch 'origin/master'

docs/composer/plugin/d4d/index.md

@@ -104,6 +104,7 @@ Note that Solr, Node and Varnish are not enabled by default. See the [customizat
 ### PHP Debugging
 
 By default, PHP is configured with XDebug being enabled and you should check the instructions for your IDE on how to get started with a debugging session.
+For the IDE's IntelliJ and PHPStorm from [Jetbrains](https://jetbrains.com) you find an instruction [here](../../../dev_tools/index.md#debugging-drupal-code).
 
 ### Watch the logs
 

docs/dev_tools/index.md

+---
+title: Developer Tools
+tags:
+- documentation
+- tools
+---
+# Developer Tools
+
+## IDE
+
+We use the IDE's IntelliJ and PHPStorm from [Jetbrains](https://jetbrains.com), because we are convinced to use best toolset in the 
+market so far.
+
+## Debugging Drupal Code
+
+### Add a PHP Server
+
+First, you have to set up a Drupal environment with the tool [l3d](../docker/l3d/index.md). The tool is 
+based on Docker containers.
+
+Now navigate to File->Settings in your IDE and create a server:
+
+![Screenshot](/files/screenshots/settings_php_new_server.png)
+
+Set the following values:
+
+![Screenshot](/files/screenshots/settings_php_add_server.png)
+
+**Important: Always use Docker as name of your server.** 
+
+Do not forget to add the file mapping to `/var/www/html`.
+
+### Add a new Run/Debug Configuration
+
+![Screenshot](/files/screenshots/configuration_add.png)
+
+First create a new `PHP Web Page` configuration:
+
+![Screenshot](/files/screenshots/configuration_new_webpage.png)
+
+Set the following values:
+
+![Screenshot](/files/screenshots/configuration_done.png)
+
+Select the server you just have created.
+
+**Important: Always use Docker as name of your configuration.** 
+
+### Start Debugging
+
+First, check the debug settings in your IDE. It should look something like this:
+
+![Screenshot](/files/screenshots/settings_php_debug.png)
+
+Now activate the `Phone` icon in your IDE:
+
+![Screenshot](/files/screenshots/start_debug.png)
+
+Now you can set your breakpoints and enjoy debugging Drupal code.
+
+## Execute Drupal tests within your IDE
+
+

docs/new-features.md

-# New in version 2021.3.4: 
+# New in version 2021.12.15: 
 
 --------
-- [Ansible Wiki ELK Re-Indexing](ansible/wiki/elk/re-indexing.html)
-
-	> __
-
-- [Docker Node, Gulp SASS and BrowserSync](docker/node/gulp-sass.html)
+- [](dev_tools/index.md)
 
 	> __

mkdocs.yml

@@ -224,3 +224,5 @@ nav:
       - Introduction: devops/alm/alm.md
       - Hosting and Monitoring: devops/alm/hosting_maintain.md
       - Tools: devops/alm/tools.md
+  - Developer Tools:
+    - Home: dev_tools/index.md