By default, you can deploy fastro web apps on Cloud Run, a fully managed serverless platform built by Google.
Download gcloud sdk
curl -O https://dl.google.com/dl/cloudsdk/channels/rapid/downloads/google-cloud-sdk-315.0.0-linux-x86_64.tar.gz
tar xvzf google-cloud-sdk-315.0.0-linux-x86_64.tar.gz
Install gcloud sdk
See the sdk quickstart for detail instruction.
Cloud run abstracts all infrastructure management by automatically scaling up and down from zero almost instantaneously - depending on traffic. It also only charges you for the exact resources you use.
Google App Engine lets app developers build scalable web and mobile back ends in any programming language on a fully managed serverless platform.