tsidp-server: add warning for -use-local-tailscaled flag

Signed-off-by: Benson Wong <benson@tailscale.com>

Author: mostlygeek

tsidp-server.go

@@ -89,6 +89,15 @@ func main() {
 		lns []net.Listener
 	)
 	if *flagUseLocalTailscaled {
+		fmt.Println("")
+		fmt.Println("┌─[ IMPORTANT WARNING ]────────────────────────────────────────────────────┐")
+		fmt.Println("│                                                                          │")
+		fmt.Println("│  -use-local-tailscaled is for development only.                          │")
+		fmt.Println("│                                                                          │")
+		fmt.Println("│  Do not use it in production deployments.                                │")
+		fmt.Println("│                                                                          │")
+		fmt.Println("└──────────────────────────────────────────────────────────────────────────┘")
+		fmt.Println("")
 		lc = &local.Client{}
 		st, err = lc.StatusWithoutPeers(ctx)
 		if err != nil {