feat: add new file

package.json

@@ -5,19 +5,25 @@
   "type": "module",
   "scripts": {
     "dev": "vite",
+    "api": "node server/index.js",
+    "api:seed": "node server/seed.js",
     "build": "vite build",
     "typecheck": "tsc --noEmit",
     "lint": "eslint .",
     "preview": "vite preview"
   },
   "dependencies": {
+    "better-sqlite3": "^11.6.0",
+    "cors": "^2.8.5",
     "echarts": "^5.5.0",
     "echarts-for-react": "^3.0.2",
+    "express": "^4.21.1",
     "lucide-react": "^0.460.0",
     "mapbox-gl": "^3.6.0",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
     "react-map-gl": "^7.1.7",
+    "ws": "^8.19.0",
     "zustand": "^5.0.0"
   },
   "devDependencies": {