Set Sidekiq configuration per Heroku's policies
user
```ruby
# https://devcenter.heroku.com/articles/forked-pg-connections#sidekiq
Sidekiq.configure_server do |config|
  database_url = ENV['DATABASE_URL']
  if database_url
    ENV['DATABASE_URL'] = "#{database_url}?pool=25"
    ActiveRecord::Base.establish_connection
  end
end
```
assistant