Add build to README, change port, add systemd service

README.md

@@ -1,4 +1,6 @@
 # lifepo4wered-exporter
 Simplistic Prometheus exporter for LiFePO4wered-Pi statistics
 
-TODO: finish writing the readme
+```shell
+GOOS=linux GOARCH=arm GOARM=6 go build -o lfp-exporter .
+```

exporter.go

@@ -1,3 +1,4 @@
+// The lifepo4wered-exporter binary serves Prometheus metrics based on the output
 package main // import "github.com/DrJosh9000/lifepo4wered-exporter"
 
 import (
@@ -15,7 +16,7 @@ import (
 )
 
 var (
-	addr = flag.String("listen-address", ":8080", "The address to listen on for HTTP requests.")
+	addr = flag.String("listen-address", ":9454", "The address to listen on for HTTP requests.")
 
 	lifepo4weredVars = prometheus.NewGaugeVec(
 		prometheus.GaugeOpts{

lfp-exporter.service

@@ -0,0 +1,9 @@
+[Unit]
+Description=LiFePO4wered-Pi+ Prometheus exporter
+
+[Service]
+ExecStart=/usr/local/bin/lfp-exporter
+Restart=always
+
+[Install]
+WantedBy=multi-user.target