chore: sync from fn-registry agent

main.go

@@ -0,0 +1,43 @@
+package main
+
+import (
+	"fmt"
+	"os"
+)
+
+func main() {
+	if len(os.Args) < 2 {
+		printUsage()
+		os.Exit(1)
+	}
+
+	switch os.Args[1] {
+	case "serve":
+		cmdServe(os.Args[2:])
+	case "target":
+		cmdTarget(os.Args[2:])
+	case "deploy":
+		cmdDeploy(os.Args[2:])
+	case "setup":
+		cmdSetup(os.Args[2:])
+	case "status":
+		cmdStatus(os.Args[2:])
+	case "help", "-h", "--help":
+		printUsage()
+	default:
+		fmt.Fprintf(os.Stderr, "unknown command: %s\n", os.Args[1])
+		printUsage()
+		os.Exit(1)
+	}
+}
+
+func printUsage() {
+	fmt.Println(`deploy_server — CI/CD server for fn_registry apps
+
+Usage:
+  deploy_server serve [--port PORT]         Start webhook server (default: 9090)
+  deploy_server target add|list|remove      Manage deploy targets
+  deploy_server deploy <app> [--host HOST]  Deploy an app
+  deploy_server setup <app> --host HOST     First-time setup on VPS
+  deploy_server status <app>|--all          Check remote service status`)
+}