Docs: Improve ElasticSearch Documentation
We have seen areas where the documentation for ElasticSearch can be improved. Some general areas are:
- Async indexing spins up many Sidekiq processes (reference to Extra Sidekiq Processes)
- Information on tweaking max payloads
- Minimum specs for an ElasticSearch server (link to ElasticSearch Hardware Docs)
- Information on the rake tasks (and links to the code)
- Information on batch sizing
- More on troubleshooting