forward from heroku app hosted on cedar-14 stack?

Question

Is there a way to forward traffic from an old heroku app hosted on their (no longer supported) cedar-14 stack to the new version of the app (on heroku-18)? I can no longer build to the cedar-14 site. Both apps are using Heroku's default domains, [app name].herokuapp.com.

question from:https://stackoverflow.com/questions/65644649/forward-from-heroku-app-hosted-on-cedar-14-stack

Answer 1

The goal is to keep the old code in case it is needed while directing people visiting the old domain access to the newly written site. This can be accomplished with carefully sequenced site name changes. Heroku describes how to change site names here. You will also have to update git remotes and such on your local machine but the Heroku instructions tell you how to do that, too.

The now somewhat obvious sequence is:

1. change name of [old site] to something like [old_site]-backup
2. change name of [new site] to [old site]