diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b512c09
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+node_modules
\ No newline at end of file
diff --git a/README.md b/README.md
index 1112622..5f745a8 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@ To test locally, you'll need:
 
 how to test:
 1. Download this repo to a folder
-2. Open terminal in this folder, type `npm run serve`
+2. Open terminal in this folder, type`npm install`, wait till it's done, then `npm run serve`
 3. Go to http://localhost:3000 on your Chrome browser
 4. click start button, observe