How to Run Multiple Versions of Rails on Heroku (New Buildpack w/ Dual Boot Support)
Imagine having the ability to deploy the next version of Rails in a dual booted application on your Heroku staging server or review app before deploying it to production. This capability can help you avoid bugs and downtime in your live environment. In this blog post, we will guide you on how to deploy a Rails upgrade to a staging environment, allowing you to thoroughly test it before it goes live.
Heroku buildpack building from a different Gemfile can be very helpful during the upgrade process. It allows developers to check the deployment process for the next planned version and test a real application in a review environment.
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