https://medium.com/hackernoon/canary-deployments-in-serverless-applications-b0f47fa9b409
https://lumigo.io/aws-lambda-deployment/canary-deployment-for-aws-lambda/
for canary deployments
to add alertts
- https://www.npmjs.com/package/serverless-plugin-aws-alerts
- https://github.com/ACloudGuru/serverless-plugin-aws-alerts
To configure trafic migration
To read about healthchecks
To prune previous versions