add simple install script and systemd service

systemd/bash-logging.service

@@ -0,0 +1,12 @@
+[Unit]
+Description=BASH based InfluxDB logging script
+After=network.target
+
+[Service]
+ExecStart=/usr/bin/env bash main.sh
+WorkingDirectory=/opt/bash-logging/
+Restart=always
+RestartSec=3
+
+[Install]
+WantedBy=multi-user.target