Fun to see that we share some very similar ideas with Replibyte - an open source tool to seed a dev database with real data. https://github.com/Qovery/replibyte
If you are looking for a HA alternative, Qovery is the one. It's a Heroku like platform running on AWS built for running production workload. It's multi AZ by design.
Yeah you can use preview/review apps via the `apps:clone` command[1]. It can be used in a pipeline to setup custom apps for code branches, allowing folks to stand up custom versions in CI for merge/pull requests[2]. If your deployment platform doesn't support this in some way, I would definitely recommend investigating it, as there is a _ton_ of stuff you can do with this.
Not familiar with Qovery, but yes you can create preview envs. They’re called “review apps” for Dokku and it’s super neat. It ties in really nicely with GitHub actions so you can spawn and tear down preview environments with each pull request: https://github.com/dokku/github-action/blob/master/example-w....
Heroku didn't failed, they have been a huge innovative solution for a world generation in of developers. As a CEO and developer myself, I do believe that the next gen platform would be based on a similar experience as Heroku, but on top of the best cloud service providers.
E.g: Qovery.com is the Heroku-like experience on top of AWS