Merge branch 'v4.3' of github.com:mongodb/docs-node into v4.3

Author: Chris Cho

source/index.txt

@@ -24,15 +24,11 @@ MongoDB Node Driver
 Introduction
 ------------
 
-Welcome to the official MongoDB Node.js driver documentation.
+Welcome to the documentation site for the official MongoDB Node.js 
+driver. You can add the driver to your application to work with MongoDB 
+in JavaScript. Download it using `npm <https://www.npmjs.com/>`__ 
+or set up a runnable project by following our Quick Start guide.
 
-Connect your Node.js applications to MongoDB and work with your data
-using the Node.js driver. The driver features an asynchronous API that you can
-use to access method return values through Promises or specify callbacks to
-access them when communicating with MongoDB.
-
-On this page, you can find descriptions of each section of the driver
-documentation.
 
 Quick Start
 -----------