【BUG】Missing .env configuration

[Sinosaurus]

 "scripts": {
    "dev": "npm-run-all --parallel dev:frontend dev:backend",
    "with-env": "dotenv -e ../../.env",
    "dev:frontend": "pnpm run with-env vite dev",
    "dev:backend": "convex dev --tail-logs",
    "build": "vite build",
    "start": "vite start",
    "lint": "prettier --check '**/*' --ignore-unknown && eslint --ext .ts,.tsx ./src",
    "format": "prettier --write '**/*' --ignore-unknown",
    "linkAll": "node scripts/link.js"
  },

What is the .env configuration?