There is no documentation for such things anywhere.
You need to learn and implement the components as per your use case.
Related topics and repos:
- Continuous delivery and continuous deployment of Frappe/ERPNext with Docker and Kubernetes
- app to deploy pr sites for user review GitHub - revant/erpnext_feature_board: Feature board for ERPNext
- FluxCD gitops repo castlecraft / Fluxcd Starter · GitLab
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