add grafana dashboard to prometheus-grafana example

Author: kbrwn

authzed-dedicated-metrics/prometheus-grafana/README.md

@@ -58,6 +58,10 @@ Here's an example of a filled-out configuration:
 
 4. Run `docker compose up`
 
+### Grafana dashboard
+
+This example auto-provisions the SpiceDB Grafana dashboard from `grafana/dashboards/spicedb_grafana_dash.json` when Grafana starts.
+
 ### Ports:
 
 Prometheus: 9090

authzed-dedicated-metrics/prometheus-grafana/compose.yaml

@@ -21,6 +21,8 @@ services:
       - "GF_SECURITY_ADMIN_USER=admin"
       - "GF_SECURITY_ADMIN_PASSWORD=grafana"
     volumes:
-      - "./grafana:/etc/grafana/provisioning/datasources"
+      - "./grafana/datasource.yml:/etc/grafana/provisioning/datasources/datasource.yml"
+      - "./grafana/dashboard.yml:/etc/grafana/provisioning/dashboards/dashboard.yml"
+      - "./grafana/dashboards:/etc/grafana/provisioning/dashboards"
 volumes:
   prom_data:

authzed-dedicated-metrics/prometheus-grafana/grafana/dashboard.yml

@@ -0,0 +1,11 @@
+apiVersion: 1
+
+providers:
+  - name: "spicedb"
+    orgId: 1
+    folder: ""
+    type: "file"
+    disableDeletion: false
+    editable: true
+    options:
+      path: /etc/grafana/provisioning/dashboards