Docs: Document how to roll back a bad deploy #75
Merged
+64
−3
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Add a rollback section to docs/ci-cd.md. Re-running the deploy of the last good commit gets the site working within minutes, and reverting the merge on main stops the next merge from deploying the bad code again. The section also lists what a rollback does not undo: the database, the VM's .env and one-time setup, and pages already open in a browser.
Closes #69