Previously when I run rails generate react_on_rails:install. I'll have this in my Procfile.dev:
web: rails s
hot: sh -c 'cd client && npm start'
client: sh -c 'rm app/assets/javascripts/generated/* || true && cd client && npm run build:dev:client'
Now when I install again in a fresh application, the hot is missing and I have to add it manually. So running foreman start -f Procfile.dev won't start the server for hot reloading.