Nuxt3 SSR应用部署至Google App Engine遇500错误求助

我需要将采用*Server-Side Rendering (SSR)*的Nuxt3应用部署到Google App Engine标准或弹性环境，目前已经通过Docker容器成功部署到GCP Cloud Run，但因为需要设置分发规则实现用户导航，必须将其部署为App Engine项目内的服务。目前官方仅提供Nuxt2的部署文档，Nuxt3相关内容缺失导致部署流程卡壳。

我的package.json配置如下：

{
  "name": "nuxt-app",
  "private": true,
  "type": "module",
  "scripts": {
    "build": "nuxi build",
    "dev": "nuxt dev",
    "generate": "nuxt generate",
    "preview": "nuxt preview",
    "postinstall": "nuxt prepare",
    "start": "node .output/server/index.mjs",
    "gcp-build": ""
  },
  "devDependencies": {
    "@nuxt/devtools": "latest",
    "@nuxtjs/i18n": "^8.0.0-rc.5",
    "@nuxtjs/tailwindcss": "^6.8.0",
    "nuxt": "^3.7.4",
    "nuxt-icon": "^0.5.0",
    "nuxt-viewport": "^2.0.6",
    "vue": "^3.3.4",
    "vue-router": "^4.2.5"
  },
  "dependencies": {
    "@nuxtjs/color-mode": "^3.3.0",
    "flowbite": "^1.8.1",
    "prettier": "^3.0.3"
  }
}

用于弹性环境的app.yaml配置如下：

runtime: nodejs
env: flex
entrypoint: npm start
service: "nuxt-frontend"
runtime_config:
  operating_system: ubuntu22

automatic_scaling:
  max_num_instances: 1

部署成功后访问网页出现500错误，日志显示对应报错信息，寻求解决方案。

内容的提问来源于stack exchange，提问作者RuSsCiTy