docs: redirect to config

Signed-off-by: QuentinN42 <quentin@lieumont.fr>

README.md

@@ -1,25 +1,4 @@
 # Rezelator
 
 Create a sample website from a json.
-
-```json
-[
-    {
-        "name": "Cat1",
-        "items": [
-            {
-                "name": "Item1",
-                "description": "Description of Item1",
-                "url": "http://www.example.com/item1",
-                "image": "http://www.example.com/item1.png"
-            },
-            {
-                "name": "Item2",
-                "description": "Description of Item2",
-                "url": "http://www.example.com/item2",
-                "image": "http://www.example.com/item2.png"
-            }
-        ]
-    }
-]
-```
+Read the `config.json` file to configure the website.