feat: added README file

README.md

@@ -0,0 +1,24 @@
+# Welcome to the APEx documentation portal
+
+This GitHub repository manages the content of the APEx documentation portal.
+The generation of the content is based on [Quarto](https://quarto.org/).
+If you want to preview the content and your changes, it is important to install the Quarto CLI before edidt
+Once this has been completed you can preview the content by running the following command:
+
+```bash
+quarto preview .
+```
+
+# Welcome to the APEx documentation portal
+
+This GitHub repository serves as the central hub for managing the APEx documentation portal. 
+The content generation is facilitated by [Quarto](https://quarto.org/), an open-source scientific and technical publishing system.
+
+To preview the content and any changes you make, it's crucial to install the Quarto CLI beforehand. 
+Once installed, you can preview the content by running the following command in your terminal:
+
+```bash
+quarto preview .
+```
+
+This command will initiate a local preview of the documentation portal, allowing you to review your changes before committing them.