Fixing FanOutOnWriteService, fixing Sidekiq not having enough DB connections

in the pool, adding a throttle of 60rpm per IP, adding mini profiler, adding
admin status to users

config/database.yml

@@ -1,6 +1,6 @@
 default: &default
   adapter: postgresql
-  pool: 5
+  pool: 25
   timeout: 5000
   encoding: unicode
 

config/initializers/rack-attack.rb

@@ -1,3 +1,5 @@
 class Rack::Attack
-  # TODO
+  throttle('req/ip', limit: 300, period: 5.minutes) do |req|
+    req.ip
+  end
 end

config/routes.rb

@@ -1,7 +1,7 @@
 require 'sidekiq/web'
 
 Rails.application.routes.draw do
-  authenticate :user do
+  authenticate :user, lambda { |u| u.admin? } do
     mount Sidekiq::Web => '/sidekiq'
   end