Update README.md

README.md

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 # NutritionZ
 NutritionZ adds a nutrition system to enhance the gameplay.
 
-### Installation
+## Installation
 NutritionZ is a mod built for the [Fabric Loader](https://fabricmc.net/). It requires [Fabric API](https://www.curseforge.com/minecraft/mc-mods/fabric-api) and [Cloth Config API](https://www.curseforge.com/minecraft/mc-mods/cloth-config) to be installed separately; all other dependencies are installed with the mod.
 
-### License
-NutritionZ is licensed under MIT.
+## License
+NutritionZ is licensed under MIT.
+
+## Datapacks
+You can add custom mod support with datapacks.
+Just create a [datapack](https://minecraft.wiki/w/Data_pack) with a `pack.mcmeta` & a version for your minecraft version.
+
+Then you just need a folder structure for the mod e.g. `data/modid/nutrition/sometext.json`.
+
+In this json you can add the mods items & give them nutrient values.  
+
+```json
+{
+    "modid:itemid": {
+        "carbohydrates": 0,
+        "protein": 0,
+        "fat": 0,
+        "vitamins": 0,
+        "minerals": 0
+    },
+    "modid:itemid2": {
+        "carbohydrates": 0,
+        "protein": 0,
+        "fat": 0,
+        "vitamins": 0,
+        "minerals": 0
+    }
+}
+```
+### More Infos
+*The default datapack gives 5 values per half hunger.*  
+You also currently can't overwrite the default datapacks (items & values added via them)