add explanation of storage structure in the final package

cep-recipe-serialization.md

@@ -11,6 +11,38 @@ The goal is to have a single file that contains all the information needed to
 reproduce an exact build of a package. This will enable better reproducibility,
 provenance tracking, and debugging of conda packages.
 
+## Storage
+
+The rendered recipe YAML file is stored in the `info/recipe` folder of the final
+package. Alongside the rendered recipe, we copy the entire "recipe folder".
+If the original recipe was not named `recipe.yaml`, then we rename it inside the package.
+
+For example:
+
+```txt
+├── recipe
+    ├── patches
+    │   └── patch1.diff
+    ├── build.sh
+    ├── build.bat
+    └── my_recipe.yaml
+```
+
+Will be copied into the following folder structure in the final package:
+
+```txt
+├── ...
+├── index.json
+└── recipe
+    ├── build.bat
+    ├── build.sh
+    ├── recipe.yaml
+    ├── patches
+    │   └── patch1.diff
+    ├── rendered_recipe.yaml
+    └── variant_config.yaml
+```
+
 ## Specification
 
 The rendered recipe YAML file contains the following top-level sections: