Use N web dynos and M worker dynos on Heroku review app

Question

I am currently using Heroku's Review apps feature and it is great. The only issue is that at the moment, when a new app is created from a pull request, it only has 1 web Dyno and 0 workers. My app requires a couple of web Dynos and workers, hence I need to manually edit those in my dashboard. Is there a way (e.g. through the app.json config) to specify the number of Dynos used and their type when a new Review app is created?

Answer 1

Update: this is now officially supported

Try adding something like this to your app.json

"formation": {
      "web": { 
          "quantity": 1
      },
      "worker": { 
          "quantity": 1
      }
},

https://devcenter.heroku.com/articles/app-json-schema#formation