fix: add serve for production deployment

package.json

@@ -45,6 +45,7 @@
     "react-snap": "^1.23.0",
     "reactflow": "^11.11.4",
     "serialize-javascript": "^6.0.0",
+    "serve": "^14.2.4",
     "turndown": "^7.2.1",
     "web-vitals": "^2.1.4"
   },
@@ -56,6 +57,7 @@
   },
   "scripts": {
     "start": "react-scripts start",
+    "start:prod": "serve -s build -l 3000",
     "build": "react-scripts build && react-snap",
     "build:no-snap": "react-scripts build",
     "test": "react-scripts test",