我遇到了同样的问题，没有运气就尝试了上面的答案。经过大量的试验和错误，我最终获得了下面的app.yaml。该设置适用于我使用Google Cloud Build的设置，以直接部署到Google App Engine。

另外，它还将HTTP请求重定向到HTTPS，并跳过通常不需要的文件。

我确信可能会有更有效的方法来执行此操作，但是一旦我成功了，我就不敢再更改它了。

app.yaml：

runtime: python27
api_version: 1
threadsafe: yes

handlers:
  - url: /(.+\.js)
    static_files: dist/project/\1
    upload: dist/project/(.+\.js)
    secure: always
    redirect_http_response_code: 301

  - url: /(.+\.css)
    static_files: dist/project/\1
    upload: dist/project/(.+\.css)
    secure: always
    redirect_http_response_code: 301

  - url: /(.+\.png)
    static_files: dist/project/\1
    upload: dist/project/(.+\.png)
    secure: always
    redirect_http_response_code: 301

  - url: /(.+\.jpg)
    static_files: dist/project/\1
    upload: dist/project/(.+\.jpg)
    secure: always
    redirect_http_response_code: 301

  - url: /(.+\.gif)
    static_files: dist/project/\1
    upload: dist/project/(.+\.gif)
    secure: always
    redirect_http_response_code: 301

  - url: /(.+\.svg)
    static_files: dist/project/\1
    upload: dist/project/(.+\.svg)
    secure: always
    redirect_http_response_code: 301

  - url: /favicon.ico
    static_files: dist/project/favicon.ico
    upload: dist/project/favicon.ico
    secure: always
    redirect_http_response_code: 301

  - url: /(.+\.json)
    static_files: dist/project/\1
    upload: dist/project/(.+\.json)
    secure: always
    redirect_http_response_code: 301

  - url: /(.+)
    static_files: dist/project/index.html
    upload: dist/project/index.html
    secure: always
    redirect_http_response_code: 301

  - url: /
    static_files: dist/project/index.html
    upload: dist/project/index.html
    secure: always
    redirect_http_response_code: 301

skip_files:
  - e2e/
  - node_modules/
  - src/
  - ^(.*/)?\..*$
  - ^(.*/)?.*\.md$
  - ^(.*/)?.*\.yaml$
  - ^LICENSE