fix: update npm start script to run locally

package.json

@@ -7,7 +7,7 @@
     "client": "vite --config vite.config.js",
     "clientinstall": "npm install --prefix client",
     "server": "node index.js",
-    "start": "concurrently 'npm run server' 'npm run client'",
+    "start": "concurrently \"npm run server\" \"npm run client\"",
     "build": "vite build",
     "test": "NODE_ENV=test mocha --exit",
     "test-coverage": "nyc npm run test",