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

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

@@ -0,0 +1,13 @@
+//go:build (!linux || !arm64) && (!linux || !riscv64) && !windows && go1.7
+// +build !linux !arm64
+// +build !linux !riscv64
+// +build !windows
+// +build go1.7
+
+package daemon
+
+import "golang.org/x/sys/unix"
+
+func syscallDup(oldfd int, newfd int) (err error) {
+	return unix.Dup2(oldfd, newfd)
+}