Logging expansion

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

deployment/docker/config/grafana/datasources/loki-datasource.yml

@@ -0,0 +1,12 @@
+apiVersion: 1
+datasources:
+  - name: Loki
+    uid: loki
+    type: loki
+    access: proxy
+    orgId: 1
+    url: http://loki:3100
+    basicAuth: false
+    isDefault: false
+    version: 1
+    editable: true

deployment/docker/config/grafana/datasources/prometheus-datasource.yml

@@ -0,0 +1,11 @@
+apiVersion: 1
+datasources:
+  - name: Prometheus
+    type: prometheus
+    uid: prometheus
+    access: proxy
+    orgId: 1
+    url: "http://prometheus:9090"
+    basicAuth: false
+    isDefault: true
+    editable: true