requirements: changes

backend/CHANGELOG.md

@@ -14,6 +14,11 b' The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).'
 <!-- ### Fixed -->
 
 
+## Unreleased [2.0.0 - 2019-04-XX]
+### Changed
+* require Elasticsearch 6.x
+* move data structure to single document per index 
+
 ## [1.2.0 - 2019-03-17]
 ### Changed
 * Replaced elasticsearch client

backend/README.md

@@ -13,8 +13,8 b' Manual Installation'
 To run the app you need to have meet prerequsites:
 
 - python 3.5+
-- running elasticsearch (2.3+/2.4 tested)
-- running postgresql (9.5+ required)
+- running elasticsearch (6.6.2 tested)
+- running postgresql (9.5+ required, tested 9.6 and 10.6)
 - running redis
 
 Install the app by performing