Left file: appwork-v1_3_1/rails-starter/config/cable.yml  
Right file: appwork-v1_4_0/rails-turbolinks-starter/config/cable.yml  
development: = development:
  adapter: async     adapter: async
     
test:   test:
  adapter: async <>   adapter: test
  =  
production:   production:
  adapter: redis     adapter: redis
  url: <%= ENV.fetch("REDIS_URL") { "redis://localhost:6379/1" } %>     url: <%= ENV.fetch("REDIS_URL") { "redis://localhost:6379/1" } %>
  channel_prefix: rails-starter_production     channel_prefix: rails-starter_production