Docker-compose was a limiting factor for me as well. I am seeing more and more projects that I deploy --- maybe 25 of the 50 I deploy a month -- using docker-compose.
I would love a simple docker-compose plugin, or a way to deploy with compose (I'd be okay if it gave a warning that 'may cause potential issues etc etc').
Do you have any resources on how to write plugins for dokku?
Again, I am extremely impressed by dokku and a big fan. I think a significant amount of your users would benefit from some way to use docker-compose. Would love to contribute.
Can't wait to see future releases!