Ensure sub-processes and resources work in production

[gabrieljoelc]

From #2:

• Other sub-processes/resrouces to still be tested:
  • ActiveMail - SMTP
  • ActiveJob - Redis
  • ActionCable - Redis, CORS
  • Cache - Redis

Some things we might need:

• Dockerfile.sidekiq
• Dockerfile.cable
  so we can do (see this doc):

heroku container:push --recursive
=== Building web
=== Building sidekiq
=== Building cable

Also, consider renaming website to web in docker-compose.yml to align with the web Dyno process.