Add ability to daemonize program, update sample config, README.md, add .gitignore

vendor/github.com/sevlyar/go-daemon/syscall_dup3.go

@@ -0,0 +1,13 @@
+//go:build linux && (riscv64 || arm64)
+// +build linux
+// +build riscv64 arm64
+
+package daemon
+
+import "syscall"
+
+func syscallDup(oldfd int, newfd int) (err error) {
+	// linux_arm64 platform doesn't have syscall.Dup2
+	// so use the nearly identical syscall.Dup3 instead.
+	return syscall.Dup3(oldfd, newfd, 0)
+}