action cable subscribing locally, but not on heroku - ruby-on-rails

Question

I've been trying everything I can find online, and nothing is working. Hoping some fresh eyes will see the issue. This is my first time using ActionCable, and everything works great locally, but when pushing to heroku. my logs do not show any actioncable subscriptions like my dev server:
[ActionCable] [email#email.com] MsgsChannel is streaming from msg_channel_34
and when sending a message, I do see [ActionCable] Broadcasting to msg_channel_34: but they are not appending, which I'm guessing means that the received method is not being accessed/called?
I do notice on heroku's logs it says Listening on tcp://0.0.0.0:5000 where as dev it is listening at localhost:3000. Should I be pointnig towards my heroku app somehow?
Here are the relevant configuration files:
Procfile:
web: bundle exec puma -p 5000 ./config.ru
actioncable: bundle exec puma -p 28080 cable/config.ru
redis: redis-server
***Thanks to the comment below, I am also trying. Still not working, but I can see that the port it's listening to is changing, making me believe it has something to do with the configuration? :
web: bundle exec puma -p $PORT ./config.ru
actioncable: bundle exec puma -p $PORT cable/config.ru
redis: redis-server
/cable/config.ru
require ::File.expand_path('../../config/environment', __FILE__)
Rails.application.eager_load!
ActionCable.server.config.allowed_request_origins = ["http://localhost:3000"]
run ActionCable.server
config/environments/development.rb
config.action_cable.allowed_request_origins = ['localhost:3000']
config.action_cable.url = "ws://localhost:3000/cable"
config/environments/production.rb
config.web_socket_server_url = "wss://app-name.herokuapp.com/cable"
config.action_cable.allowed_request_origins = ['https://app-name.herokuapp.com', 'http://app-name.herokuapp.com']
config/cable.yml
local: &local
adapter: async
:url: redis://localhost:6379
:host: localhost
:port: 6379
:timeout: 1
:inline: true
development: *local
test: *local
production:
:url: redis:<%= ENV["REDISTOGO_URL"] %>
adapter: redis
<%= ENV["REDISTOGO_URL"] %> is set, confirmed by running heroku config
routes.rb
mount ActionCable.server => '/cable'
Why is this working on dev, but not on heroku? I've been reading for hours, but can not figure it out. Thank you!!
UPDATE:
heroku logs:
2017-01-25T20:32:57.329656+00:00 heroku[web.1]: Starting process with command `bundle exec puma -p 5000 ./config.ru`
2017-01-25T20:32:59.600554+00:00 app[web.1]: Puma starting in single mode...
2017-01-25T20:32:59.600574+00:00 app[web.1]: * Version 3.6.2 (ruby 2.3.1-p112), codename: Sleepy Sunday Serenity
2017-01-25T20:32:59.600575+00:00 app[web.1]: * Min threads: 0, max threads: 16
2017-01-25T20:32:59.600577+00:00 app[web.1]: * Environment: production
2017-01-25T20:33:02.375128+00:00 app[web.1]: profile controller
2017-01-25T20:33:02.588653+00:00 app[web.1]: Use Ctrl-C to stop
2017-01-25T20:33:02.588446+00:00 app[web.1]: * Listening on tcp://0.0.0.0:5000
2017-01-25T20:33:17.681469+00:00 heroku[web.1]: Error R10 (Boot timeout) -> Web process failed to bind to $PORT within 60 seconds of launch
2017-01-25T20:33:17.681469+00:00 heroku[web.1]: Stopping process with SIGKILL
2017-01-25T20:33:17.862118+00:00 heroku[web.1]: Process exited with status 137
2017-01-25T20:33:57.501746+00:00 heroku[web.1]: Error R10 (Boot timeout) -> Web process failed to bind to $PORT within 60 seconds of launch
2017-01-25T20:33:57.501908+00:00 heroku[web.1]: Stopping process with SIGKILL
2017-01-25T20:33:57.630071+00:00 heroku[web.1]: Process exited with status 137
2017-01-25T20:33:57.642753+00:00 heroku[web.1]: State changed from starting to crashed

Answer 1

The issue was my host is the heroku app, but the requests were coming from the custom domain.
To solve:
heroku config:set RAILS_HOST "http://www.example.com"
And then in production.rb:
config.action_cable.url = "wss://#{ENV['RAILS_HOST']}/cable"

Answer 2

Is your app name literally app-name? I suspect not. Odds are pretty good that these values...
config.web_socket_server_url = "wss://app-name.herokuapp.com/cable"
config.action_cable.allowed_request_origins = ['https://app-name.herokuapp.com', 'http://app-name.herokuapp.com']
Need to be updated to use the actual public-facing URL you intend to connect to.

Answer 3

Your procfile suggests that you run puma with cable/cable.ru on port 28080. Also - file cable/config.ru shouldn't contain this line:
ActionCable.server.config.allowed_request_origins = ["http://localhost:3000"]
You already configured this in config/environment/*.rb

Answer 4

I had the same issue, and found the answer I needed here: redis gem 4+ incompatibility "Specified 'redis' for Action Cable pubsub adapter, but the gem is not loaded". Once I downgraded my redis to 3.1.0, worked perfectly.