add node exporter and program directories

install-node-exporter.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+PROM_DIR=/var/prometheus-node-exporter
+
+mkdir $PROM_DIR/
+
+apt install prometheus-node-exporter
+
+chown prometheus:prometheus $PROM_DIR
+
+echo "ARGS+= --collector.textfile.directory $PROM_DIR" \
+     >> /etc/default/prometheus-node-exporter
+
+install rdl_prometheus /usr/local/bin/