Update build layer script and README

Author: Charoite Lee

README.md

@@ -8,22 +8,23 @@
 
 [node-canvas](https://github.com/Automattic/node-canvas) is a Cairo backed Canvas implementation for Node.js. It implements the [Mozilla Web Canvas API](https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API) as closely as possible. For the current API compliance, please check [Compatibility Status](https://github.com/Automattic/node-canvas/wiki/Compatibility-Status).
 
-## General Features
+## How this layer is built?
 
-s
+The Lambda Layer is built from source of node-canvas NPM package on EC2 instance, with following native dependencies installed. Check ``` build-layer.sh ``` for details.
 
-## Fabric.js Support
+```bash
+gcc-c++ cairo-devel pango-devel libjpeg-turbo-devel giflib-devel librsvg2-devel pango-devel bzip2-devel
+```
 
-[Fabric.js](https://github.com/fabricjs/fabric.js) is a framework that makes it easy to work with HTML5 canvas element. It is an interactive object model on top of canvas element. It is also an SVG-to-canvas (and canvas-to-SVG) parser.
-
-## Konva Support
+Since AWS Lambda is a secure and isolated runtime and execution environment, this layer aims to target AWS Lambda compatiable build. As there are canvas libraries and frameworks relying on node-canvas running on Node.js runtime, this layer also tries to include and support these libraries and frameworks.
 
-[Konva](https://github.com/konvajs/konva) 
+### Fabric.js support
 
+[Fabric.js](https://github.com/fabricjs/fabric.js) is a framework that makes it easy to work with HTML5 canvas element. It is an interactive object model on top of canvas element. It is also an SVG-to-canvas (and canvas-to-SVG) parser.
 
-## Paper.js Support
+### Konva support
 
-s
+[Konva](https://github.com/konvajs/konva) is a framework that enables high performance animations, transitions, node nesting, layering, filtering, caching, event handling for desktop and mobile applications, and much more.
 
 ## Getting started
 

build-layer.sh

@@ -27,7 +27,6 @@ npm init -y
 npm install canvas --build-from-source
 npm install fabric
 npm install konva-node
-npm install paper-jsdom-canvas
 npm install mocha --save-dev
 jq --arg LAYER_NAME "$LAYER_NAME" --arg LAYER_DESCRIPTION "$LAYER_DESCRIPTION" --arg LAYER_VERSION "$LAYER_VERSION" --arg LAYER_AUTHOR "$LAYER_AUTHOR" '.name = $LAYER_NAME | .description = $LAYER_DESCRIPTION | .version = $LAYER_VERSION | .license = "MIT" | .author = $LAYER_AUTHOR | .scripts.test = "mocha"' package.json > package-tmp.json
 mv -f package-tmp.json package.json