In support of User Story: https://github.com/troupe/gitter-webapp/issues/1995
This PR does several things:
Removes the console logger Adds a winston logger Adds a stats provider to log to the winston logger
What does this give us?
When a stat.event is fired, the winston logger will write the event (with metadata) to Kibana.
The log entry can then be cut up further in Kibana and used for reporting.
