test(react-start): flame perf setup uses pure nitro, no express layer (#6463)

Author: Sheraff

e2e/react-start/flamegraph-bench/package.json

@@ -4,22 +4,22 @@
   "type": "module",
   "scripts": {
     "build": "NODE_ENV=production vite build --mode=production",
-    "start": "NODE_ENV=production node ./tests/server.js",
-    "start:prof": "NODE_ENV=production flame run --md-format=detailed ./tests/server.js",
+    "start": "NODE_ENV=production node ./.output/server/index.mjs",
+    "start:prof": "NODE_ENV=production flame run --md-format=detailed ./.output/server/index.mjs",
     "bench": "pnpm build && pnpm bench:run",
     "bench:run": "concurrently -k -s first \"pnpm start:prof\" \"sleep 3 && node ./tests/bench.js\""
   },
   "dependencies": {
     "@tanstack/react-router": "workspace:*",
     "@tanstack/react-start": "workspace:*",
-    "express": "^4.21.2",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
     "srvx": "^0.10.0"
   },
   "devDependencies": {
     "@platformatic/flame": "latest",
     "@vitejs/plugin-react": "^4.3.4",
+    "nitro": "npm:nitro-nightly@latest",
     "autocannon": "^8.0.0",
     "concurrently": "9.2.1",
     "typescript": "^5.7.2",

e2e/react-start/flamegraph-bench/tests/server.js

@@ -1,10 +1,11 @@
 import { defineConfig } from 'vite'
 import { tanstackStart } from '@tanstack/react-start/plugin/vite'
 import viteReact from '@vitejs/plugin-react'
+import { nitro } from 'nitro/vite'
 
 export default defineConfig({
   server: {
     port: 3000,
   },
-  plugins: [tanstackStart(), viteReact()],
+  plugins: [tanstackStart(), viteReact(), nitro()],
 })