feat: add dockerized 3proxy control plane backend

package.json

@@ -5,7 +5,10 @@
   "type": "module",
   "scripts": {
     "dev": "vite",
-    "build": "tsc && vite build",
+    "dev:server": "tsx server/index.ts",
+    "build:client": "vite build",
+    "build:server": "tsc -p tsconfig.server.json --noEmit && esbuild server/index.ts --bundle --platform=node --format=cjs --outfile=server-dist/index.cjs",
+    "build": "npm run build:client && npm run build:server",
     "preview": "vite preview",
     "test": "vitest",
     "test:run": "vitest run"
@@ -14,15 +17,21 @@
     "@testing-library/jest-dom": "^6.9.1",
     "@testing-library/react": "^16.3.2",
     "@testing-library/user-event": "^14.6.1",
+    "@types/express": "^5.0.6",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
+    "@types/supertest": "^7.2.0",
     "@vitejs/plugin-react": "^6.0.1",
+    "esbuild": "^0.27.4",
     "jsdom": "^29.0.1",
+    "supertest": "^7.2.2",
+    "tsx": "^4.21.0",
     "typescript": "~5.9.3",
     "vite": "^8.0.1",
     "vitest": "^4.1.2"
   },
   "dependencies": {
+    "express": "^5.2.1",
     "react": "^19.2.4",
     "react-dom": "^19.2.4"
   }