Since I've never used Docker, I can't answer. A Procfile works well with what you'd want to do on Heroku: run a webserver, and maybe run some other worker proc

Since I've never used Docker, I can't answer. A Procfile works well with what you'd want to do on Heroku: run a webserver, and maybe run some other worker process. It's a single line per process, equivalent to what you run locally.