enhancement/puppeteer-as-module

[jszuminski]

Description

For now, the readme.md file included in the repository shows a way to use the highcharts-export-server as a node module which is no longer working in the latest v3.0.0.

The main problem is that since 3.0.0 we initialize default settings inside initPool and startExport which are supposed to be easy-to-use by the users. Merging userOptions with defaultOptions should take place somewhere else - the users should not worry about it.

• I've added the initExportSettings method which takes care of merging userOptions with defaultOptions for chart.startExport
• I've added initialization of the options inside the lib/index.js initPool() method

Tasks

• Add initExportSettings method
• Update readme.md

[cvasseng]

Is this ready for merging?

[jszuminski]

Waiting for @PaulDalek's review. If @PaulDalek and you approve of this I think it's ready to merge.

[cvasseng]

Looks good!