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Use mise in app initialisation #433

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Use mise in app initialisation #433

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lukasbischof Jan 13, 2026
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Add note about supported Ruby version
lukasbischof Jan 13, 2026
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7 changes: 3 additions & 4 deletions ruby_on_rails/app_initialisation.md
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## Default Rails setup

* Ensure that your asdf plugins are up to date with `asdf plugin update --all`.
* Ensure that your mise plugins are up to date with `mise plugin update`.

* Install the latest Ruby version with `asdf install ruby latest` (Check if it's [supported by Heroku](https://devcenter.heroku.com/articles/ruby-support#ruby-versions)).

* Switch your global Ruby to the fresh one: `asdf global ruby latest`.
* Ensure you are using the latest Ruby version globally (`mise use -g ruby@latest`) and that it is
supported by Deploio.

* Run `gem update --system` to update Ruby's default gems (e.g. `bundler`).

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