modificato conf alloy e compose x hostname in grafana

vm1/docker-compose.yml

@@ -146,6 +146,7 @@ services:
     restart: unless-stopped
     environment:
       TZ: Europe/Rome
+      HOSTNAME: vm1
     volumes:
       - ./alloy-config.alloy:/etc/alloy/config.alloy:ro
       - /var/run/docker.sock:/var/run/docker.sock:ro
@@ -163,6 +164,8 @@ services:
       - "12345:12345" # Alloy UI
     networks:
       - app-network
+    labels:
+      hostname: "vm1"
 networks:
   app-network:
 volumes: