add WSL instruction

Signed-off-by: arhimede <julian@dotkernel.com>

Author: arhimede

docs/book/v4/installation/getting-started.md

@@ -1,6 +1,12 @@
 # Clone the project
 
-Using your terminal, navigate inside the directory you want to download the project files into. Make sure that the directory is empty before proceeding to the download process. Once there, run the following command:
+## Recommended development environment
+
+> If you are using Windows as OS on your machine, you can use WSL2 as development environment.
+> Read more here: [PHP-Mariadb-on-WLS2](https://www.dotkernel.com/php-development/almalinux-9-in-wsl2-install-php-apache-mariadb-composer-phpmyadmin/)
+
+Using your terminal, navigate inside the directory you want to download the project files into. Make sure that the
+directory is empty before proceeding to the download process. Once there, run the following command:
 
 ```shell
 git clone https://github.com/dotkernel/api.git .

docs/book/v5/installation/getting-started.md

@@ -1,6 +1,12 @@
 # Clone the project
 
-Using your terminal, navigate inside the directory you want to download the project files into. Make sure that the directory is empty before proceeding to the download process. Once there, run the following command:
+## Recommended development environment
+
+> If you are using Windows as OS on your machine, you can use WSL2 as development environment.
+> Read more here: [PHP-Mariadb-on-WLS2](https://www.dotkernel.com/php-development/almalinux-9-in-wsl2-install-php-apache-mariadb-composer-phpmyadmin/)
+
+Using your terminal, navigate inside the directory you want to download the project files into. Make sure that the
+directory is empty before proceeding to the download process. Once there, run the following command:
 
 ```shell
 git clone https://github.com/dotkernel/api.git .