I don't really get what this is about? Ok, connecting the technology to Elasticsearch - but it would be much more helpful if the article contains some description of a problem that is solved by doing this.

Just seems like "yeah we just wrote a doc article on how to set up our technology, let's drop it to HN and get some traffic".

edit:// It doesn't even explain HOW these things are coupled. Just download the git repository and execute it.