Update file-structure.md

we should split this page in 2 or more pages

docs/book/v4/introduction/file-structure.md

@@ -1,21 +1,30 @@
 # File structure
 
-It is a good practice to standardize the file structure of projects. This way it’s easier to keep a clean overview of multiple projects, and less time is wasted trying to find the correct class.
+Dotkernel API follows the [PSR-4](https://www.php-fig.org/psr/psr-4/) standards.
 
-When using DotKernel API the following structure is recommended:
+It is a good practice to standardize the file structure of projects. 
 
-## Main directories
+When using DotKernel API the following structure is installed by default:
+
+![Dotkernel API File Structure!](https://github.com/dotkernel/dotkernel.github.io/blob/main/img/file-structure-dk-api.png)
 
-* `src` - should contain the source code files
-* `templates` - should contain the page templates and layouts
-* `data` - should contain project-related data (AVOID storing sensitive data on VCS)
-* `docs` - should contain project-related documentation
 
-These directories reside in one of the following directories:
+## Main directories
+* `bin` - executable files from CLI
+* `config` - various configuration files
+* `data` - should contain project-related data (AVOID storing sensitive data on VCS)
+* `documentation` - should contain project-related documentation
+* `log` - storage of log files generated by dot-error-log library
+* `public` - publicly visible files. The webserver need to have this folder as www-document root folder.
+* `src` - should contain the source code files
+* `test` - should contain the test files
 
-* if the Module is a composer package where the directories above are stored in the package’s root path, eg.: `/vendor/my-name/my-project-name/`
-* if the Module is an extension/component for the project, eg.: `/src/MyProjectName`
+## Special purpose folders
+* `.github`  - containes workflow files
+* `.laminas-ci` - contains laminas-ci workflow files
+* `docs` -  Dotkernel API documentation
 
+
 ## The `src` directory
 
 This directory contains all source code related to the Module. It should contain following directories, if they’re not empty: