added example

.gitignore

@@ -0,0 +1 @@
+.idea/

example/.gitignore

@@ -0,0 +1,3 @@
+app
+alpine*.img*
+flash.sh

example/build_image.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+docker run --rm -v "$PWD":/work -w /work -e GOOS=linux -e GOARCH=arm -e GOARM=5 golang:1.13-alpine go build -v -o ./app .
+
+docker run --rm -it -v "$PWD":/input -v $PWD:/output bboehmke/raspi-alpine-builder

example/image.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+cp ${INPUT_PATH}/app ${ROOTFS_PATH}/usr/bin/test_app
+cp ${INPUT_PATH}/init.sh ${ROOTFS_PATH}/etc/init.d/test_app
+
+chroot_exec rc-update add test_app default

example/init.sh

@@ -0,0 +1,13 @@
+#!/sbin/openrc-run
+
+command="/usr/bin/test_app"
+pidfile="/var/run/test_app.pid"
+command_args=""
+command_background=true
+
+
+depend() {
+	use logger dns
+	need net
+	after firewall
+}

example/main.go

@@ -0,0 +1,10 @@
+package main
+
+import "net/http"
+
+func main() {
+	http.HandleFunc("/", func(writer http.ResponseWriter, _ *http.Request) {
+		writer.Write([]byte("It works!"))
+	})
+	http.ListenAndServe(":8080", nil)
+}