Even better, use GCS (Google cloud storage) configured to serve static files as a website:
The Website Configuration feature enables you to configure a Google Cloud Storage bucket to simulate the behavior of a static website. You can define main pages or directory indices (for example, index.html) for buckets and "directories". Also, you can define a custom error page in case a requested resource does not exist.
https://developers.google.com/storage/docs/website-configuration
Then to update it's just to copy the files into the bucket with a command line tool or browser based interface.