Move prometheus + grafana to metrics. Edit readme

metrics/grafana/provisioning/datasources/datarource.yml

@@ -0,0 +1,25 @@
+apiVersion: 1
+
+datasources:
+  - name: Prometheus
+    type: prometheus
+    access: proxy
+    # Access mode - proxy (server in the UI) or direct (browser in the UI).
+    url: http://prometheus:9090
+    jsonData:
+      httpMethod: POST
+      manageAlerts: true
+      prometheusType: Prometheus
+      prometheusVersion: 2.49.0
+      cacheLevel: 'High'
+      disableRecordingRules: false
+      incrementalQueryOverlapWindow: 10m
+      exemplarTraceIdDestinations:
+        # Field with internal link pointing to data source in Grafana.
+        # datasourceUid value can be anything, but it should be unique across all defined data source uids.
+        - datasourceUid: 000000001
+          name: traceID
+
+        # Field with external link.
+        - name: traceID
+          url: 'http://host.docker.internal:3000/explore?orgId=1&left=%5B%22now-1h%22,%22now%22,%22Jaeger%22,%7B%22query%22:%22$${__value.raw}%22%7D%5D'