Start documenting NodeJS module

node_examples/README.md

@@ -1,8 +1,33 @@
+NOTE: This document is a work in progress
+
 # Calling WebPlotDigitizer algos from NodeJS
 
+## Purpose
+
+For some applications, the simple-to-use WebPlotDigitizer GUI can be quite restrictive and a programmatic/command-line access to the underlying algorithms is needed. Being able to process a large number of similar images is one such example. 
+
+To make this possible, the core functions of WebPlotDigitizer have been packaged into a [NodeJS](https://nodejs.org) module that can be called from custom NodeJS scripts or applications.
+
+## Current State
+
+The current module is the first attempt at providing a "library" for users. In the future, the API and capabilities are likely to change quite a bit.
+
 ## Pre-Requisites
 
-1. Install NodeJS
-2. Build WPD node module
+### Install NodeJS
+
+On Linux, you should be able to use the package manager. On other operating systems, visit: https://nodejs.org/
+
+### Build or Download WebPlotDigitizer NodeJS Module
+
+WIP
+
+### Install other dependencies
+
+For many scripts, you may need to install additional packages to open images etc. You can install those as needed via the `npm install` command. For example,
+
+    npm install jimp # package used in examples to read images
 
+## Examples
 
+See `*.js` files in this folder.