Add npx command for node version 8.2.0 and later

docs/tutorial/quick-start.md

@@ -175,6 +175,12 @@ electron .
 
 If you've installed it locally, then run:
 
+### Node v8.2.0 and later
+
+```
+$ npx electron .
+```
+
 #### macOS / Linux
 
 ```bash