Merge "gerrit-fe-dev-helper: Add `addRespHeader` rule."
diff --git a/README.md b/README.md
index fc965b7..a01cad1 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,7 @@
 ### BUILD
 
 ```
+npm install
 npm run build
 ```