On first install, a PUBLIC_URL of YOURAPPNAME.herokuapp.com is initially used. When you add a custom domain name in Heroku, and then update the PUBLIC_URL in Heroku environment variables, Ghost won’t pick up this change until a redeploy happens.
Redeploys mean that you need access to git on the command line (or have your Heroku app linked to a Github repo), which is not ideal.
You can commit an empty commit: https://stackoverflow.com/questions/41345744/redeploy-heroku-app-without-code-changes
And there is a relatively new Heroku plugin, Releases Retry https://www.npmjs.com/package/heroku-releases-retry, that doesn’t require a git commit but does need heroku command line tools.
Solutions:
- fully document connecting git to your heroku app and doing an empty git commit
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