title: (Error connecting to Redis on localhost:6379 (Errno::ECONNREFUSED)):
body: <p>I deploy small rails app on heroku with one CRUD.</p>
  
  <p>heroku config --app painting-art</p>
  
  <pre><code>This is the legacy Heroku CLI. Please install the new CLI from https://cli.heroku.com
  === painting-art Config Vars
  DATABASE_URL:             [postgres]
  LANG:                     en_US.UTF-8
  RACK_ENV:                 production
  RAILS_ENV:                production
  RAILS_LOG_TO_STDOUT:      enabled
  RAILS_SERVE_STATIC_FILES: enabled
  SECRET_KEY_BASE: [SECRET_KEY_BASE] 
  </code></pre>
  
  <p>I am getting error like below</p>
  
  <pre><code>2018-05-29T07:21:12.395658+00:00 app[web.1]: I, [2018-05-29T07:21:12.395584 #4]  INFO -- : [070ffe50-8753-4e61-8fe3-1273de66a29e] Completed 500 Internal Server Error in 12ms (ActiveRecord: 3.4ms)
  2018-05-29T07:21:12.396947+00:00 app[web.1]: F, [2018-05-29T07:21:12.396874 #4] FATAL -- : [070ffe50-8753-4e61-8fe3-1273de66a29e]   
  2018-05-29T07:21:12.397040+00:00 app[web.1]: F, [2018-05-29T07:21:12.396976 #4] FATAL -- : [070ffe50-8753-4e61-8fe3-1273de66a29e] ActionView::Template::Error (Error connecting to Redis on 127.0.0.1:6379 (Errno::ECONNREFUSED)):
  2018-05-29T07:21:12.397328+00:00 app[web.1]: F, [2018-05-29T07:21:12.397247 #4] FATAL -- : [070ffe50-8753-4e61-8fe3-1273de66a29e]     18:       &lt;tr&gt;
  </code></pre>
  
  <p>help me to solve this error.
  thank you</p>