https://spoon-elastic.com/all-elastic-search-post/live-business-intelligence-salesforce-elastic-search-heroku-kibana-part-1-indexing-datas/
https://spoon-elastic.com/all-elastic-search-post/business-intelligence-bi/live-business-intelligence-bi-with-salesforce-elastic-search-heroku-and-kibana-part-2-dashboards/