Onboarding - new team member

### Overview

We need a new person joining the DevOps CoP to be able to get themselves set up and
understand how the community works, without having to ask someone. Today they cannot:
the onboarding checklist that exists is written for a different team, the wiki
contradicts itself about when we meet, and the steps we are supposed to perform for
them are not written down anywhere.

### Action Items

Tracked as sub-issues. This issue closes when they do.

### Resources/Instructions

- [DevOps wiki](https://github.com/hackforla/devops/wiki)
- [DevOps CoP Roster](https://docs.google.com/spreadsheets/d/1j6l2cdyAEZ73NCXw0CwwMnh8tZda-oE7tu8usBwv4Bs)
- Existing recurring onboarding issues, kept deliberately outside this epic:
hackforla/devops#30 (CoP leads) and hackforla/incubator#27 (incubator team members)

从 DevOps wiki、DevOps CoP Roster 以及反复出现的 onboarding issue hackforla/devops#30 和 hackforla/incubator#27 开始。确定涵盖 checklist、会议信息以及为新成员执行的步骤的已跟踪 sub-issue；当这些 sub-issue 完成且 onboarding 流程实现 self-service 时，此 issue 即完成。

由索引模型根据 Issue 内容生成。