Added REDIS for actoncable.

Gemfile

@@ -14,7 +14,7 @@ gem 'webpacker', '~> 4.0'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 gem 'jbuilder', '~> 2.7'
 # Use Redis adapter to run Action Cable in production
-# gem 'redis', '~> 4.0'
+gem 'redis', '~> 4.0'
 # Use Active Model has_secure_password
 # gem 'bcrypt', '~> 3.1.7'
 

Gemfile.lock

@@ -139,6 +139,7 @@ GEM
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
+    redis (4.1.4)
     regexp_parser (1.7.0)
     rubyzip (2.3.0)
     selenium-webdriver (3.142.7)
@@ -190,6 +191,7 @@ DEPENDENCIES
   listen (~> 3.2)
   puma (~> 4.1)
   rails (~> 6.0.3)
+  redis (~> 4.0)
   selenium-webdriver
   spring
   spring-watcher-listen (~> 2.0.0)