runtime: nodejs12
handlers:
# Serve all static files with url ending with a file extension
- url: /(.*\..+)$
  static_files: \1
  upload: (.*\..+)$
  secure: always
  redirect_http_response_code: 301

# Catch all handler to index.html
- url: /.*
  static_files: index.html
  upload: index.html
  secure: always
  redirect_http_response_code: 301