Hey, Júnior, I hope you are very well. I didn't know you can do that with Rails. I'm very new in this ecosystem and in Ruby in general. But I don't know how to add different databases to each environment. Maybe you can find the answer asking here: github.com/hanami/hanami/issues. Or in its discourse site: discourse.hanamirb.org Or in its subreddit: reddit.com/r/hanamirb
Sorry, I can help you with your question.
Thank you for your question.
Have a nice day.