feat: simplified the steps to run the web app (#79)

package.json

@@ -58,6 +58,7 @@
     "eslint-plugin-react": "^7.23.2",
     "prettier": "^2.2.1",
     "react-scripts": "4.0.3",
+    "serve": "^11.3.2",
     "typescript": "^4.2.4",
     "web-vitals": "^1.1.1"
   },
@@ -65,7 +66,7 @@
     "start": "react-scripts start",
     "build": "react-scripts build",
     "test": "react-scripts test",
-    "eject": "react-scripts eject",
+    "serve": "serve -s ./build",
     "lint": "eslint --fix \"src/**/*.ts\" \"src/**/*.tsx\" && prettier --write \"src/**/*.ts\" \"src/**/*.tsx\"",
     "lint:check": "eslint \"src/**/*.ts\" \"src/**/*.tsx\" && prettier --check \"src/**/*.ts\" \"src/**/*.tsx\""
   },