Use users timezone for timestamp

Gemfile

@@ -8,6 +8,7 @@ gem 'faraday-http-cache'
 gem 'faraday_middleware'
 gem 'jquery-rails'
 gem 'kaminari'
+gem 'local_time'
 gem 'octicons_helper'
 gem 'octokit'
 gem 'omniauth-github'

Gemfile.lock

@@ -51,6 +51,13 @@ GEM
     byebug (9.0.6)
     codeclimate-test-reporter (1.0.4)
       simplecov
+    coffee-rails (4.2.1)
+      coffee-script (>= 2.2.0)
+      railties (>= 4.0.0, < 5.2.x)
+    coffee-script (2.4.1)
+      coffee-script-source
+      execjs
+    coffee-script-source (1.12.2)
     concurrent-ruby (1.0.4)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
@@ -91,6 +98,8 @@ GEM
     listen (3.0.8)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
+    local_time (1.0.3)
+      coffee-rails
     lograge (0.4.1)
       actionpack (>= 4, < 5.1)
       activesupport (>= 4, < 5.1)
@@ -249,6 +258,7 @@ DEPENDENCIES
   jquery-rails
   kaminari
   listen (~> 3.0.5)
+  local_time
   lograge
   mocha
   newrelic_rpm

app/assets/javascripts/application.js

@@ -1,6 +1,7 @@
 //= require jquery
 //= require jquery_ujs
 //= require turbolinks
+//= require local_time
 //= require bootstrap-sprockets
 //= require_tree .
 

app/views/notifications/_notification.html.erb

@@ -32,7 +32,7 @@
   </td>
   <td class='notification-date'>
     <small class='text-muted'>
-      <%= notification.updated_at.localtime.to_s(:short) %>
+      <%= local_time(notification.updated_at, :short) %>
     </small>
   </td>
 </tr>