Issue
I want to run more than a single command in a dyno.
Resolution
The quickest way maybe to list the commands to run, each followed by an &, with a wait -n in the end, in the Procfile, e.g.:
web: puma -C config/puma.rb & sidekiq & wait -n
This runs all the command in the background. wait -n exits when at least one of the commands exits and triggers the dyno to restart. Please watch the app metrics so that the commands don't exhaust memory and CPU.