Add grafana image renderer

ansible/roles/grafana/files/docker-compose.yml

@@ -6,11 +6,14 @@ services:
     environment:
       - TZ=Europe/London
       - GF_DATABASE_URL=postgres://grafana:grafana@db/grafana
+      - GF_RENDERING_SERVER_URL=http://renderer:8081/render
+      - GF_RENDERING_CALLBACK_URL=http://grafana:3000/
     volumes:
       - /mnt/tank/app-data/grafana:/var/lib/grafana
     restart: unless-stopped
     depends_on:
       - db
+      - renderer
     networks:
       - default
       - grafana
@@ -28,6 +31,12 @@ services:
       - POSTGRES_PASSWORD=grafana
       - POSTGRES_USER=grafana
 
+  renderer:
+    image: grafana/grafana-image-renderer:latest
+    restart: unless-stopped
+    environment:
+      - BROWSER_TZ=Europe/London
+
 networks:
   grafana:
     external: true