server config

config/environments/production.rb

@@ -3,7 +3,8 @@ Rails.application.configure do
 
   # Code is not reloaded between requests.
   config.cache_classes = true
-
+  config.serve_static_assets = true
+  config.public_file_server.enabled = true
   # Eager load code on boot. This eager loads most of Rails and
   # your application in memory, allowing both threaded web servers
   # and those relying on copy on write to perform better.

config/initializers/assets.rb

@@ -7,7 +7,8 @@ Rails.application.config.assets.version = '1.0'
 # Rails.application.config.assets.paths << Emoji.images_path
 # Add Yarn node_modules folder to the asset load path.
 Rails.application.config.assets.paths << Rails.root.join('node_modules')
-
+Rails.application.config.assets.precompile += %w(application.js application.css)
+Rails.application.config.public_file_server.enabled = true
 # Precompile additional assets.
 # application.js, application.css, and all non-JS/CSS in the app/assets
 # folder are already added.

yarn.lock

@@ -0,0 +1,4 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+