Add details about consumer replicas
Add CONSUMER_REPLICAS to .env.example
Change `consumer: deploy: replicas` to use CONSUMER_REPLICAS var to keep user config options in one file
Adds Promtail and Loki to the metrics stack, configuring them as a datasource in grafana on deployment
Adds a dashboard to monitor the system (logs for producer and consumer)
Restructures the base directory so deployment manifests are moved into a deployments folder
Adds selective labels to producer, consumer and addon so that their logs are ingested by promtail