Bumped all deployment files to use docker images (yelb-ui, yelb-appse…

…rver and yelb-db) with tag 0.5

Updated the yelb-ui Linux script to allow the angular app to compile …

…properly (bumped Node to 8.11 + other minor fixes)

Experimental support for injecting custom arbitrary endpoints into ye…

…lb-ui and yelb-appserver

Added Postgres as an additional persistency layer (as well as some co…

…smetic changes to the app UI)

Added support for persistent storage (through commented volumes decla…

…ration) in the docker platform deployment files