Update README.md

Author: raaaar

samples/browser/README.md

@@ -1,7 +1,9 @@
 To launch sample-server.js
 1. `echo YOUR_BING_SPEECH_API_KEY > speech.key`
+
+2. `npm install`
 
-2.  * The server and the client are on the same subnet:
-    `node sample-server.js`
+3.  * The server and the client are on the same subnet:
+    `node sample-server.js`.
     * The server and the client are on different subnets, server is not accessible from the outside:
-    * `node sample-server.js enableTunnel`
+    `node sample-server.js enableTunnel`