diff --git a/config/example/README.md b/config/example/README.md
index cdc5e101d7..eb3e494afd 100644
--- a/config/example/README.md
+++ b/config/example/README.md
@@ -10,4 +10,8 @@ It is not recommended to transfer these configs for real application launches.
 
 - Storage node
   - JSON: `node.json`
-  - YAML: `node.yaml`
\ No newline at end of file
+  - YAML: `node.yaml`
+  
+## Environment variables
+
+- Storage node: `node.env`
\ No newline at end of file