incident-plan.txt
My app: <describe>. Host: <host>. Users: <who they are>.

Write me a one-page incident plan:
- The first three things to check, in order, when something's wrong.
- How to tell "it's my code" from "it's the host" from "it's a
  third party".
- The rollback command, exactly.
- What to tell users, where, and how quickly.
- What to capture before I start fixing, so I can work out the cause
  afterwards.

Keep it short enough to follow at 3am. Then tell me what I should set
up now so this is easier later.

Capture the logs before restarting. Restarting often fixes it and destroys the only evidence of what happened.