documentation updates

docker-compose/prometheus/exporters/node_exporter/docker-compose.yml

@@ -0,0 +1,13 @@
+---
+version: '3.8'
+
+services:
+  node_exporter:
+    image: quay.io/prometheus/node-exporter:latest
+    container_name: node_exporter
+    command:
+      - '--path.rootfs=/host'
+    pid: host
+    restart: unless-stopped
+    volumes:
+      - '/:/host:ro,rslave'