Tools

1. operator-sdk: Kubernetes operator framework
2. controller-runtime: Kubernetes operator development tool
3. controller-tools:
   1. bump to v0.13.0 in controller-runtime: https://github.com/kubernetes-sigs/controller-runtime/pull/2450
4. golang-migrate: database schema migration tool
5. atlas: database schema migration tool
6. helm: release package management
7. kind: local cluster
8. kuttl: e2e test
9. ginkgo: Go test
10. skaffold: local run & mysql-operator setup for testing