DNS Runbook

[jaspermayone]

### Tasks
- [ ] Author DNS Policies
- [ ] Add policies to the top of major config files as a reminder
- [ ] Update Codeowners

[jaspermayone]

My stuffs on this is blocked by my schoolwork mountain, might take a stab this weekend if I have the time tho!

[ajhalili2006]

Can I help with writing the runbooks docs/scripts, since it went to the backburner for more than a year (currently on Hell Week for Midterms Major Exam in college)?

[alx-alexpark]

this is something we should probably do