add grafana and use promethesus as resource

grafana/provisioning/datasources/datasource.yaml

@@ -0,0 +1,9 @@
+apiVersion: 1
+
+datasources:
+  - name: Prometheus
+    type: prometheus
+    access: proxy
+    url: http://prometheus:9090
+    isDefault: true
+    editable: true

spring-petclinic.yml

@@ -20,8 +20,22 @@ services:
     depends_on:
       - petclinic
 
+  grafana:
+    image: grafana/grafana:latest
+    ports:
+      - "3000:3000"
+    volumes:
+      - grafana_data:/var/lib/grafana
+    networks:
+      - custom-network
+    environment:
+      - GF_SECURITY_ADMIN_PASSWORD=admin
+    depends_on:
+      - prometheus
+
 volumes:
   prometheus_data:
+  grafana_data:
 
 networks:
   custom-network: