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

vendor/github.com/sevlyar/go-daemon/os_executable_pre18.go

@@ -0,0 +1,12 @@
+//go:build !go1.8
+// +build !go1.8
+
+package daemon
+
+import (
+	"github.com/kardianos/osext"
+)
+
+func osExecutable() (string, error) {
+	return osext.Executable()
+}