[Prod] Configure sidekiq through env variables

Procfile

@@ -1,4 +1,4 @@
 server: bin/rails server -p 9000 -b 0.0.0.0
 # server: bundle exec unicorn -c config/unicorn/development.rb
-jobs: bundle exec sidekiq -c 1 -q low_prio -q tags -q default -q high_prio -q video
+jobs: SIDEKIQ_QUEUES="low_prio:1;tags:2;default:3;high_prio:5" bundle exec sidekiq
 cron: run-parts /etc/periodic/daily && crond -f

config/sidekiq.yml

@@ -1,6 +1,5 @@
 ---
 :verbose: false
-:concurrency: 5
 
 # Set timeout to 8 on Heroku, longer if you manage your own systems.
 :timeout: 30
@@ -9,11 +8,8 @@
 # even put in dynamic logic, like a host-specific queue.
 # http://www.mikeperham.com/2013/11/13/advanced-sidekiq-host-specific-queues/
 :queues:
-  - [low_prio, 1]
-  - [tags, 2]
-  - [default, 3]
-  - [high_prio, 5]
+<% ENV.fetch("SIDEKIQ_QUEUES").split(";").map { |e| e.split(":") }.each do |queue, priority| %>
+  - [<%= queue %>, <%= priority %>]
+<% end %>
 
-# you can override concurrency based on environment
-production:
-  :concurrency: 15
+:concurrency: <%= ENV.fetch("SIDEKIQ_CONCURRENCY", 5) %>