change grafana to dockerfile to add munin after

dockercompose/docker-compose.yml

@@ -12,11 +12,16 @@ services:
       - ../prometheus/prometheus.yml:/etc/prometheus/prometheus.yml:ro
     command:
       - "--config.file=/etc/prometheus/prometheus.yml"
+    depends_on:
+      - back
+      - db
     networks:
       - app-network
 
   grafana:
-    image: grafana/grafana:latest
+    build:
+      context: ..
+      dockerfile: dockerfiles/grafana/Dockerfile
     container_name: grafana
     restart: unless-stopped
     volumes:

dockerfiles/grafana/Dockerfile

@@ -0,0 +1,2 @@
+FROM grafana/grafana:latest
+RUN grafana-cli plugins install grafana-munin-datasource