agile algorithm ansible book career change ci coach communication configmap course criteria cs database ddd decomposition devops docker education facilitation fallow gamification golang growth grpc inotify interview istio jira kanban kotter kubernetes leadership lean less linux mac math measurement microservices monitoring pmo podman principle process programming project-management prometheus recruitment religion safe satir scrum security service-mesh skaffold speech succession systems-thinking table-tennis tech-debt testing thinking-framework tmux toc tools training vagrant waterfall wsl