* Use `read` instead of `gum` in the preflight guard
* Revert "Use `read` instead of `gum` in the preflight guard"
This reverts commit 759dbb70454dccc27b78b198bf077e076750fefc.
* Install `gum`, if required, at the beginning of `install.sh`
* `gum` is already installed by the `presentation.sh` stage
* Use existing structure
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Co-authored-by: David Heinemeier Hansson <david@hey.com>