Merge branch 'ik/lcjs-3.1.0-support' into 'master'

Add support for LCJS 3.1.0

See merge request arction/lcjs/lcjs-headless!1

Author: Snekw

README.md

@@ -8,6 +8,7 @@ This package uses [JSDOM][jsdom], [node-canvas][node-canvas] and [headless-gl][g
   - [Linux](#linux)
   - [Windows](#windows)
 - [Getting Started](#getting-started)
+  - [Local Resources](#local-resources)
   - [Headless in Linux machine](#headless-in-linux-machine)
 - [Using Helpers](#using-helpers)
   - [`renderToSharp`](#rendertosharp)
@@ -90,6 +91,16 @@ const outputBuff = PNG.sync.write(chartOutput)
 fs.writeFileSync('./chartOutput.png', outputBuff)
 ```
 
+### Local Resources
+
+When using Map Chart with in Node JS you need to provide the path to the LCJS resource files. To do this provide `resourcesBaseUrl` with `fs:` prefix.
+
+```js
+const lcjs = lightningChart({
+    resourcesBaseUrl: `fs:${path.resolve(__dirname, 'node_modules', '@arction', 'lcjs', 'dist', 'resources')}`
+})
+```
+
 ### Headless in Linux machine
 
 When running lcjs-headless in a Linux environment that doesn't provide a X11 or OpenGL environment you will need two more packages to make the environment ready for lcjs-headless.