Static html file missing after generation

version: 1
frontend:
  phases:
    install:
      runtime-versions:
        nodejs: '20'
    preBuild:
      commands:
        - yarn install
    build:
      commands:
        - yarn generate
  artifacts:
    baseDirectory: '.output/public'
    files:
      - '**/*'
  cache:
    paths:
      - node_modules/**/*