Support Google Cloud Function

[suzuki-shunsuke]

• Terraform
• Run Function asynchronously
• Secrets Manager
• How to manage configuration

[suzuki-shunsuke]

• https://cloud.google.com/functions/docs/concepts/go-runtime
• https://cloud.google.com/functions/docs/create-deploy-gcloud
• https://github.com/GoogleCloudPlatform/functions-framework-go

[suzuki-shunsuke]

Run Function asynchronously

gha-trigger receives GitHub Webhook and run GitHub Actions Workflow.
GitHub Webhook has a timeout (10 seconds), so gha-trigger has to respond a request soon and handle the request asynchronously.
Google Cloud Function's HTTP Trigger works synchronously, so we have to consider how to run Google Cloud Function asynchronously.

One idea is to combine two Google Cloud Functions.

But this is a bit complicated, so ideally I'd like to implement with one function.

In AWS, I've implemented this with Amazon API Gateway.