add cadvisor/prometheus/grafana + dashboards

dockers/cadvisor/docker-compose.yml

@@ -0,0 +1,21 @@
+services:
+
+  cadvisor:
+    image: gcr.io/cadvisor/cadvisor:v0.52.0
+    container_name: cadvisor
+    command:
+      - "--housekeeping_interval=30s"
+      - "--docker_only=true"
+      - "--disable_metrics=percpu,sched,tcp,udp,disk,diskIO,hugetlb,referenced_memory,cpu_topology,resctrl"
+    ports:
+      - 8098:8080
+    volumes:
+      - /:/rootfs:ro
+      - /var/run:/var/run:ro
+      - /sys:/sys:ro
+      - /var/lib/docker/:/var/lib/docker:ro
+      - /dev/disk/:/dev/disk:ro
+    devices:
+      - /dev/kmsg
+    privileged: true
+    restart: unless-stopped